31214131 has 12 divisors (see below), whose sum is σ = 35582520. Its totient is φ = 27293760.

The previous prime is 31214123. The next prime is 31214149. The reversal of 31214131 is 13141213.

It is not a de Polignac number, because 31214131 - 2³ = 31214123 is a prime.

It is a super-2 number, since 2×31214131² = 1948643948170322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31214101) by changing a digit.

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, 1650 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (2965210).

Almost surely, 2^31214131 is an apocalyptic number.

31214131 is a deficient number, since it is larger than the sum of its proper divisors (4368389).

31214131 is a wasteful number, since it uses less digits than its factorization.

31214131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9766 (or 9753 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 31214131 is about 5586.9608017240. The cubic root of 31214131 is about 314.8597040476.

Adding to 31214131 its reverse (13141213), we get a palindrome (44355344).

The spelling of 31214131 in words is "thirty-one million, two hundred fourteen thousand, one hundred thirty-one".