31351412 has 12 divisors (see below), whose sum is σ = 55070820. Its totient is φ = 15616896.

The previous prime is 31351409. The next prime is 31351421. The reversal of 31351412 is 21415313.

It can be written as a sum of positive squares in 2 ways, for example, as 15319396 + 16032016 = 3914^2 + 4004^2 .

It is a super-2 number, since 2×31351412² = 1965822068787488, 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, 13493 + ... + 15644.

It is an arithmetic number, because the mean of its divisors is an integer number (4589235).

Almost surely, 2^31351412 is an apocalyptic number.

It is an amenable number.

31351412 is a deficient number, since it is larger than the sum of its proper divisors (23719408).

31351412 is a wasteful number, since it uses less digits than its factorization.

31351412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29410 (or 29408 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 31351412 is about 5599.2331617821. The cubic root of 31351412 is about 315.3206175366.

Adding to 31351412 its reverse (21415313), we get a palindrome (52766725).

The spelling of 31351412 in words is "thirty-one million, three hundred fifty-one thousand, four hundred twelve".