31040104431 has 24 divisors (see below), whose sum is σ = 48933092784. Its totient is φ = 17446423680.

The previous prime is 31040104427. The next prime is 31040104451. The reversal of 31040104431 is 13440104013.

It is not a de Polignac number, because 31040104431 - 2² = 31040104427 is a prime.

It is a super-2 number, since 2×31040104431² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31040104398 and 31040104407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040104451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1721830 + ... + 1739763.

It is an arithmetic number, because the mean of its divisors is an integer number (2038878866).

Almost surely, 2^31040104431 is an apocalyptic number.

31040104431 is a deficient number, since it is larger than the sum of its proper divisors (17892988353).

31040104431 is a wasteful number, since it uses less digits than its factorization.

31040104431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461671 (or 3461664 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31040104431 its reverse (13440104013), we get a palindrome (44480208444).

The spelling of 31040104431 in words is "thirty-one billion, forty million, one hundred four thousand, four hundred thirty-one".