31131205425441 has 12 divisors (see below), whose sum is σ = 49055232791760. Its totient is φ = 18867397227480.

The previous prime is 31131205425367. The next prime is 31131205425443. The reversal of 31131205425441 is 14452450213113.

31131205425441 is a `hidden beast` number, since 3 + 1 + 1 + 3 + 1 + 20 + 542 + 54 + 41 = 666.

It is not a de Polignac number, because 31131205425441 - 2³⁵ = 31096845687073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31131205425396 and 31131205425405.

It is not an unprimeable number, because it can be changed into a prime (31131205425443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157228310131 + ... + 157228310328.

It is an arithmetic number, because the mean of its divisors is an integer number (4087936065980).

Almost surely, 2^{31131205425441} is an apocalyptic number.

It is an amenable number.

31131205425441 is a deficient number, since it is larger than the sum of its proper divisors (17924027366319).

31131205425441 is a wasteful number, since it uses less digits than its factorization.

31131205425441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314456620476 (or 314456620473 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 31131205425441 its reverse (14452450213113), we get a palindrome (45583655638554).

The spelling of 31131205425441 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred five million, four hundred twenty-five thousand, four hundred forty-one".