31531004245 has 32 divisors (see below), whose sum is σ = 41338886400. Its totient is φ = 22947162624.

The previous prime is 31531004231. The next prime is 31531004251. The reversal of 31531004245 is 54240013513.

It is a cyclic number.

It is not a de Polignac number, because 31531004245 - 2⁷ = 31531004117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9673426 + ... + 9676684.

It is an arithmetic number, because the mean of its divisors is an integer number (1291840200).

Almost surely, 2^31531004245 is an apocalyptic number.

It is an amenable number.

31531004245 is a deficient number, since it is larger than the sum of its proper divisors (9807882155).

31531004245 is a wasteful number, since it uses less digits than its factorization.

31531004245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 31531004245 its reverse (54240013513), we get a palindrome (85771017758).

The spelling of 31531004245 in words is "thirty-one billion, five hundred thirty-one million, four thousand, two hundred forty-five".