31322012 has 6 divisors (see below), whose sum is σ = 54813528. Its totient is φ = 15661004.

The previous prime is 31321987. The next prime is 31322023. The reversal of 31322012 is 21022313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915248 + ... + 3915255.

It is an arithmetic number, because the mean of its divisors is an integer number (9135588).

Almost surely, 2^31322012 is an apocalyptic number.

It is an amenable number.

31322012 is a deficient number, since it is larger than the sum of its proper divisors (23491516).

31322012 is a wasteful number, since it uses less digits than its factorization.

31322012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7830507 (or 7830505 counting only the distinct ones).

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

The square root of 31322012 is about 5596.6071865015. The cubic root of 31322012 is about 315.2220220255. Note that the first 3 decimals are identical.

Adding to 31322012 its reverse (21022313), we get a palindrome (52344325).

The spelling of 31322012 in words is "thirty-one million, three hundred twenty-two thousand, twelve".