31931421475 has 6 divisors (see below), whose sum is σ = 39594962660. Its totient is φ = 25545137160.

The previous prime is 31931421469. The next prime is 31931421481. The reversal of 31931421475 is 57412413913.

It is an interprime number because it is at equal distance from previous prime (31931421469) and next prime (31931421481).

It is not a de Polignac number, because 31931421475 - 2¹⁷ = 31931290403 is a prime.

It is a super-3 number, since 3×31931421475³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 638628405 + ... + 638628454.

Almost surely, 2^31931421475 is an apocalyptic number.

31931421475 is a deficient number, since it is larger than the sum of its proper divisors (7663541185).

31931421475 is a wasteful number, since it uses less digits than its factorization.

31931421475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277256869 (or 1277256864 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The spelling of 31931421475 in words is "thirty-one billion, nine hundred thirty-one million, four hundred twenty-one thousand, four hundred seventy-five".