31240412 has 24 divisors (see below), whose sum is σ = 62600160. Its totient is φ = 13363200.

The previous prime is 31240399. The next prime is 31240439. The reversal of 31240412 is 21404213.

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, 25412 + ... + 26612.

It is an arithmetic number, because the mean of its divisors is an integer number (2608340).

Almost surely, 2^31240412 is an apocalyptic number.

It is an amenable number.

31240412 is an abundant number, since it is smaller than the sum of its proper divisors (31359748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31240412 is a wasteful number, since it uses less digits than its factorization.

31240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31240412 is about 5589.3123011691. The cubic root of 31240412 is about 314.9480455172.

Adding to 31240412 its reverse (21404213), we get a palindrome (52644625).

The spelling of 31240412 in words is "thirty-one million, two hundred forty thousand, four hundred twelve".