31020312475 has 12 divisors (see below), whose sum is σ = 40489671640. Its totient is φ = 23510131200.

The previous prime is 31020312473. The next prime is 31020312481. The reversal of 31020312475 is 57421302013.

It is not a de Polignac number, because 31020312475 - 2¹ = 31020312473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31020312473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32652486 + ... + 32653435.

Almost surely, 2^31020312475 is an apocalyptic number.

31020312475 is a deficient number, since it is larger than the sum of its proper divisors (9469359165).

31020312475 is a wasteful number, since it uses less digits than its factorization.

31020312475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65305950 (or 65305945 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 31020312475 its reverse (57421302013), we get a palindrome (88441614488).

The spelling of 31020312475 in words is "thirty-one billion, twenty million, three hundred twelve thousand, four hundred seventy-five".