31232012 has 18 divisors (see below), whose sum is σ = 63579852. Its totient is φ = 13385064.

The previous prime is 31232011. The next prime is 31232023. The reversal of 31232012 is 21023213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (31232011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79478 + ... + 79869.

It is an arithmetic number, because the mean of its divisors is an integer number (3532214).

Almost surely, 2^31232012 is an apocalyptic number.

It is an amenable number.

31232012 is an abundant number, since it is smaller than the sum of its proper divisors (32347840).

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

31232012 is a wasteful number, since it uses less digits than its factorization.

31232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159365 (or 159356 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 31232012 is about 5588.5608165251. The cubic root of 31232012 is about 314.9198149811.

Adding to 31232012 its reverse (21023213), we get a palindrome (52255225).

The spelling of 31232012 in words is "thirty-one million, two hundred thirty-two thousand, twelve".