31016312 has 16 divisors (see below), whose sum is σ = 60161400. Its totient is φ = 14973280.

The previous prime is 31016309. The next prime is 31016327. The reversal of 31016312 is 21361013.

It is a super-2 number, since 2×31016312² = 1924023220162688, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 66614 + ... + 67077.

Almost surely, 2^31016312 is an apocalyptic number.

It is an amenable number.

31016312 is a deficient number, since it is larger than the sum of its proper divisors (29145088).

31016312 is a wasteful number, since it uses less digits than its factorization.

31016312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133726 (or 133722 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 31016312 is about 5569.2290310240. The cubic root of 31016312 is about 314.1931547188.

Adding to 31016312 its reverse (21361013), we get a palindrome (52377325).

The spelling of 31016312 in words is "thirty-one million, sixteen thousand, three hundred twelve".