31004411985 has 32 divisors (see below), whose sum is σ = 55126229760. Its totient is φ = 16533504000.

The previous prime is 31004411981. The next prime is 31004411993. The reversal of 31004411985 is 58911440013.

It is not a de Polignac number, because 31004411985 - 2² = 31004411981 is a prime.

It is a super-2 number, since 2×31004411985² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31004411981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2010705 + ... + 2026065.

It is an arithmetic number, because the mean of its divisors is an integer number (1722694680).

Almost surely, 2^31004411985 is an apocalyptic number.

It is an amenable number.

31004411985 is a deficient number, since it is larger than the sum of its proper divisors (24121817775).

31004411985 is a wasteful number, since it uses less digits than its factorization.

31004411985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30326 (or 30320 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

Adding to 31004411985 its reverse (58911440013), we get a palindrome (89915851998).

The spelling of 31004411985 in words is "thirty-one billion, four million, four hundred eleven thousand, nine hundred eighty-five".