15123131031 has 16 divisors (see below), whose sum is σ = 21352893408. Its totient is φ = 9487872000.

The previous prime is 15123131017. The next prime is 15123131053. The reversal of 15123131031 is 13013132151.

15123131031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15123131031 - 2¹⁰ = 15123130007 is a prime.

It is a super-2 number, since 2×15123131031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15123130989 and 15123131007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15123131431) 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 15 ways as a sum of consecutive naturals, for example, 640231 + ... + 663431.

It is an arithmetic number, because the mean of its divisors is an integer number (1334555838).

Almost surely, 2^15123131031 is an apocalyptic number.

15123131031 is a deficient number, since it is larger than the sum of its proper divisors (6229762377).

15123131031 is a wasteful number, since it uses less digits than its factorization.

15123131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36002.

The product of its (nonzero) digits is 270, while the sum is 21.

Adding to 15123131031 its reverse (13013132151), we get a palindrome (28136263182).

The spelling of 15123131031 in words is "fifteen billion, one hundred twenty-three million, one hundred thirty-one thousand, thirty-one".