125312131631 has 16 divisors (see below), whose sum is σ = 133428837600. Its totient is φ = 117348346368.

The previous prime is 125312131561. The next prime is 125312131657. The reversal of 125312131631 is 136131213521.

It is a cyclic number.

It is not a de Polignac number, because 125312131631 - 2¹⁰ = 125312130607 is a prime.

It is a super-2 number, since 2×125312131631² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125312131594 and 125312131603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125312131691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7122161 + ... + 7139733.

It is an arithmetic number, because the mean of its divisors is an integer number (8339302350).

Almost surely, 2^125312131631 is an apocalyptic number.

125312131631 is a deficient number, since it is larger than the sum of its proper divisors (8116705969).

125312131631 is a wasteful number, since it uses less digits than its factorization.

125312131631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21898.

The product of its digits is 3240, while the sum is 29.

The spelling of 125312131631 in words is "one hundred twenty-five billion, three hundred twelve million, one hundred thirty-one thousand, six hundred thirty-one".