31242475 has 24 divisors (see below), whose sum is σ = 42711552. Its totient is φ = 22480800.

The previous prime is 31242461. The next prime is 31242499. The reversal of 31242475 is 57424213.

It is not a de Polignac number, because 31242475 - 2⁷ = 31242347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27774 + ... + 28876.

It is an arithmetic number, because the mean of its divisors is an integer number (1779648).

Almost surely, 2^31242475 is an apocalyptic number.

31242475 is a deficient number, since it is larger than the sum of its proper divisors (11469077).

31242475 is a wasteful number, since it uses less digits than its factorization.

31242475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1222 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 31242475 is about 5589.4968467654. The cubic root of 31242475 is about 314.9549780284.

Adding to 31242475 its reverse (57424213), we get a palindrome (88666688).

The spelling of 31242475 in words is "thirty-one million, two hundred forty-two thousand, four hundred seventy-five".