31131412 has 12 divisors (see below), whose sum is σ = 58670836. Its totient is φ = 14368320.

The previous prime is 31131407. The next prime is 31131421. The reversal of 31131412 is 21413113.

It can be written as a sum of positive squares in 2 ways, for example, as 17023876 + 14107536 = 4126^2 + 3756^2 .

It is a super-2 number, since 2×31131412² = 1938329626227488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299289 + ... + 299392.

Almost surely, 2^31131412 is an apocalyptic number.

It is an amenable number.

31131412 is a deficient number, since it is larger than the sum of its proper divisors (27539424).

31131412 is a wasteful number, since it uses less digits than its factorization.

31131412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598698 (or 598696 counting only the distinct ones).

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

The square root of 31131412 is about 5579.5530286932. The cubic root of 31131412 is about 314.5813267048.

Adding to 31131412 its reverse (21413113), we get a palindrome (52544525).

The spelling of 31131412 in words is "thirty-one million, one hundred thirty-one thousand, four hundred twelve".