31073012 has 6 divisors (see below), whose sum is σ = 54377778. Its totient is φ = 15536504.

The previous prime is 31072939. The next prime is 31073017. The reversal of 31073012 is 21037013.

It can be written as a sum of positive squares in only one way, i.e., 22335076 + 8737936 = 4726^2 + 2956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31073017) 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 as a sum of consecutive naturals, namely, 3884123 + ... + 3884130.

It is an arithmetic number, because the mean of its divisors is an integer number (9062963).

Almost surely, 2^31073012 is an apocalyptic number.

It is an amenable number.

31073012 is a deficient number, since it is larger than the sum of its proper divisors (23304766).

31073012 is a wasteful number, since it uses less digits than its factorization.

31073012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768257 (or 7768255 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 31073012 is about 5574.3171779152. The cubic root of 31073012 is about 314.3844939012.

The spelling of 31073012 in words is "thirty-one million, seventy-three thousand, twelve".