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13031031023 = 19316748333
BaseRepresentation
bin11000010001011010…
…11100000011101111
31020122011011222000122
430020231130003233
5203141420443043
65553020115155
7640630636043
oct141055340357
936564158018
1013031031023
11558774a52a
122638095abb
1312c894805a
148b8926023
15514031368
hex308b5c0ef

13031031023 has 4 divisors (see below), whose sum is σ = 13037781288. Its totient is φ = 13024280760.

The previous prime is 13031031011. The next prime is 13031031043. The reversal of 13031031023 is 32013013031.

13031031023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32013013031 = 42176040411.

It is a cyclic number.

It is not a de Polignac number, because 13031031023 - 214 = 13031014639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13031030992 and 13031031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031031043) 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, 3372236 + ... + 3376097.

It is an arithmetic number, because the mean of its divisors is an integer number (3259445322).

Almost surely, 213031031023 is an apocalyptic number.

13031031023 is a deficient number, since it is larger than the sum of its proper divisors (6750265).

13031031023 is an equidigital number, since it uses as much as digits as its factorization.

13031031023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6750264.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 13031031023 its reverse (32013013031), we get a palindrome (45044044054).

The spelling of 13031031023 in words is "thirteen billion, thirty-one million, thirty-one thousand, twenty-three".

Divisors: 1 1931 6748333 13031031023