31145531412304 has 40 divisors (see below), whose sum is σ = 60732879846912. Its totient is φ = 15472686188160.

The previous prime is 31145531412299. The next prime is 31145531412319. The reversal of 31145531412304 is 40321413554113.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680904 + ... + 8069479.

Almost surely, 2^{31145531412304} is an apocalyptic number.

It is an amenable number.

31145531412304 is a deficient number, since it is larger than the sum of its proper divisors (29587348434608).

31145531412304 is a wasteful number, since it uses less digits than its factorization.

31145531412304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751675 (or 9751669 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 31145531412304 its reverse (40321413554113), we get a palindrome (71466944966417).

The spelling of 31145531412304 in words is "thirty-one trillion, one hundred forty-five billion, five hundred thirty-one million, four hundred twelve thousand, three hundred four".