31261230250540 has 12 divisors (see below), whose sum is σ = 65648583526176. Its totient is φ = 12504492100208.

The previous prime is 31261230250511. The next prime is 31261230250567. The reversal of 31261230250540 is 4505203216213.

It is a junction number, because it is equal to n+sod(n) for n = 31261230250496 and 31261230250505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781530756244 + ... + 781530756283.

It is an arithmetic number, because the mean of its divisors is an integer number (5470715293848).

Almost surely, 2^{31261230250540} is an apocalyptic number.

It is an amenable number.

31261230250540 is an abundant number, since it is smaller than the sum of its proper divisors (34387353275636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31261230250540 is a wasteful number, since it uses less digits than its factorization.

31261230250540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563061512536 (or 1563061512534 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 31261230250540 its reverse (4505203216213), we get a palindrome (35766433466753).

The spelling of 31261230250540 in words is "thirty-one trillion, two hundred sixty-one billion, two hundred thirty million, two hundred fifty thousand, five hundred forty".