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315135244201 = 389810116309
BaseRepresentation
bin1001001010111111000…
…01100011011110101001
31010010102022120002121011
410211133201203132221
520130344110303301
6400434321543521
731524226243621
oct4453741433651
91103368502534
10315135244201
111117146a2288
12510aa1a4ba1
13239426ab3cb
14113772cd881
1582e62daa51
hex495f8637a9

315135244201 has 4 divisors (see below), whose sum is σ = 315945360900. Its totient is φ = 314325127504.

The previous prime is 315135244183. The next prime is 315135244213. The reversal of 315135244201 is 102442531513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102442531513 = 714634647359.

It can be written as a sum of positive squares in 2 ways, for example, as 205411994176 + 109723250025 = 453224^2 + 331245^2 .

It is a cyclic number.

It is not a de Polignac number, because 315135244201 - 225 = 315101689769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315135244241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405057766 + ... + 405058543.

It is an arithmetic number, because the mean of its divisors is an integer number (78986340225).

Almost surely, 2315135244201 is an apocalyptic number.

It is an amenable number.

315135244201 is a deficient number, since it is larger than the sum of its proper divisors (810116699).

315135244201 is an equidigital number, since it uses as much as digits as its factorization.

315135244201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810116698.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 315135244201 its reverse (102442531513), we get a palindrome (417577775714).

The spelling of 315135244201 in words is "three hundred fifteen billion, one hundred thirty-five million, two hundred forty-four thousand, two hundred one".

Divisors: 1 389 810116309 315135244201