31312134 has 24 divisors (see below), whose sum is σ = 77535120. Its totient is φ = 8946288.

The previous prime is 31312123. The next prime is 31312157. The reversal of 31312134 is 43121313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124129 + ... + 124380.

It is an arithmetic number, because the mean of its divisors is an integer number (3230630).

Almost surely, 2^31312134 is an apocalyptic number.

31312134 is an abundant number, since it is smaller than the sum of its proper divisors (46222986).

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

31312134 is a wasteful number, since it uses less digits than its factorization.

31312134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248524 (or 248521 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31312134 is about 5595.7246179561. The cubic root of 31312134 is about 315.1888814286.

Adding to 31312134 its reverse (43121313), we get a palindrome (74433447).

The spelling of 31312134 in words is "thirty-one million, three hundred twelve thousand, one hundred thirty-four".