31321264 has 20 divisors (see below), whose sum is σ = 65353456. Its totient is φ = 14455872.

The previous prime is 31321249. The next prime is 31321267. The reversal of 31321264 is 46212313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75084 + ... + 75499.

Almost surely, 2^31321264 is an apocalyptic number.

It is an amenable number.

31321264 is an abundant number, since it is smaller than the sum of its proper divisors (34032192).

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

31321264 is a wasteful number, since it uses less digits than its factorization.

31321264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150604 (or 150598 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 31321264 is about 5596.5403599009. The cubic root of 31321264 is about 315.2195127364.

Adding to 31321264 its reverse (46212313), we get a palindrome (77533577).

The spelling of 31321264 in words is "thirty-one million, three hundred twenty-one thousand, two hundred sixty-four".