31257064 has 8 divisors (see below), whose sum is σ = 58607010. Its totient is φ = 15628528.

The previous prime is 31257059. The next prime is 31257073. The reversal of 31257064 is 46075213.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 11276164 = 4470^2 + 3358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953559 + ... + 1953574.

Almost surely, 2^31257064 is an apocalyptic number.

It is an amenable number.

31257064 is a deficient number, since it is larger than the sum of its proper divisors (27349946).

31257064 is a wasteful number, since it uses less digits than its factorization.

31257064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907139 (or 3907135 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 31257064 is about 5590.8017314156. The cubic root of 31257064 is about 315.0039942384.

The spelling of 31257064 in words is "thirty-one million, two hundred fifty-seven thousand, sixty-four".