31318064 has 10 divisors (see below), whose sum is σ = 60678780. Its totient is φ = 15659024.

The previous prime is 31318051. The next prime is 31318069. The reversal of 31318064 is 46081313.

It is a super-2 number, since 2×31318064² = 1961642265416192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31318069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978674 + ... + 978705.

It is an arithmetic number, because the mean of its divisors is an integer number (6067878).

Almost surely, 2^31318064 is an apocalyptic number.

It is an amenable number.

31318064 is a deficient number, since it is larger than the sum of its proper divisors (29360716).

31318064 is a wasteful number, since it uses less digits than its factorization.

31318064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957387 (or 1957381 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 31318064 is about 5596.2544616913. The cubic root of 31318064 is about 315.2087773587.

Adding to 31318064 its reverse (46081313), we get a palindrome (77399377).

The spelling of 31318064 in words is "thirty-one million, three hundred eighteen thousand, sixty-four".