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315214544231 = 628750137513
BaseRepresentation
bin1001001011001000100…
…00000011110101100111
31010010121211202221210022
410211210100003311213
520131024410403411
6400450233345355
731526211263216
oct4454420036547
91103554687708
10315214544231
111117554355a4
125111086825b
1323955c54cc2
1411383a5307d
1582ed251edb
hex4964403d67

315214544231 has 4 divisors (see below), whose sum is σ = 315264688032. Its totient is φ = 315164400432.

The previous prime is 315214544191. The next prime is 315214544321. The reversal of 315214544231 is 132445412513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132445412513 = 784116891393.

It is a cyclic number.

It is not a de Polignac number, because 315214544231 - 234 = 298034675047 is a prime.

It is a super-2 number, since 2×3152145442312 (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315214544191 and 315214544200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315214544831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25062470 + ... + 25075043.

It is an arithmetic number, because the mean of its divisors is an integer number (78816172008).

Almost surely, 2315214544231 is an apocalyptic number.

315214544231 is a deficient number, since it is larger than the sum of its proper divisors (50143801).

315214544231 is an equidigital number, since it uses as much as digits as its factorization.

315214544231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50143800.

The product of its digits is 57600, while the sum is 35.

Adding to 315214544231 its reverse (132445412513), we get a palindrome (447659956744).

The spelling of 315214544231 in words is "three hundred fifteen billion, two hundred fourteen million, five hundred forty-four thousand, two hundred thirty-one".

Divisors: 1 6287 50137513 315214544231