31007012 has 36 divisors (see below), whose sum is σ = 58087260. Its totient is φ = 14478912.

The previous prime is 31006991. The next prime is 31007023. The reversal of 31007012 is 21070013.

It can be written as a sum of positive squares in 2 ways, for example, as 27102436 + 3904576 = 5206^2 + 1976^2 .

It is a super-2 number, since 2×31007012² = 1922869586336288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157298 + ... + 157494.

It is an arithmetic number, because the mean of its divisors is an integer number (1613535).

Almost surely, 2^31007012 is an apocalyptic number.

It is an amenable number.

31007012 is a deficient number, since it is larger than the sum of its proper divisors (27080248).

31007012 is a wasteful number, since it uses less digits than its factorization.

31007012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 31007012 is about 5568.3940234147. The cubic root of 31007012 is about 314.1617487881.

Adding to 31007012 its reverse (21070013), we get a palindrome (52077025).

The spelling of 31007012 in words is "thirty-one million, seven thousand, twelve".