31240132 has 24 divisors (see below), whose sum is σ = 68160960. Its totient is φ = 12171360.

The previous prime is 31240129. The next prime is 31240159. The reversal of 31240132 is 23104213.

It is a happy 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, 50407 + ... + 51022.

It is an arithmetic number, because the mean of its divisors is an integer number (2840040).

Almost surely, 2^31240132 is an apocalyptic number.

It is an amenable number.

31240132 is an abundant number, since it is smaller than the sum of its proper divisors (36920828).

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

31240132 is a wasteful number, since it uses less digits than its factorization.

31240132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101451 (or 101449 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31240132 is about 5589.2872533088. The cubic root of 31240132 is about 314.9471045809.

Adding to 31240132 its reverse (23104213), we get a palindrome (54344345).

The spelling of 31240132 in words is "thirty-one million, two hundred forty thousand, one hundred thirty-two".