31145475 has 12 divisors (see below), whose sum is σ = 51493976. Its totient is φ = 16610880.

The previous prime is 31145467. The next prime is 31145489. The reversal of 31145475 is 57454113.

It is not a de Polignac number, because 31145475 - 2³ = 31145467 is a prime.

It is a super-2 number, since 2×31145475² = 1940081225951250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207562 + ... + 207711.

Almost surely, 2^31145475 is an apocalyptic number.

31145475 is a deficient number, since it is larger than the sum of its proper divisors (20348501).

31145475 is a wasteful number, since it uses less digits than its factorization.

31145475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415286 (or 415281 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 31145475 is about 5580.8131128000. The cubic root of 31145475 is about 314.6286882060.

Adding to 31145475 its reverse (57454113), we get a palindrome (88599588).

The spelling of 31145475 in words is "thirty-one million, one hundred forty-five thousand, four hundred seventy-five".