31516064 has 12 divisors (see below), whose sum is σ = 62047314. Its totient is φ = 15758016.

The previous prime is 31516061. The next prime is 31516081. The reversal of 31516064 is 46061513.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 824464 = 5540^2 + 908^2 .

It is not an unprimeable number, because it can be changed into a prime (31516061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492407 + ... + 492470.

Almost surely, 2^31516064 is an apocalyptic number.

It is an amenable number.

31516064 is a deficient number, since it is larger than the sum of its proper divisors (30531250).

31516064 is an equidigital number, since it uses as much as digits as its factorization.

31516064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984887 (or 984879 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31516064 is about 5613.9169926175. The cubic root of 31516064 is about 315.8716564740.

Adding to 31516064 its reverse (46061513), we get a palindrome (77577577).

The spelling of 31516064 in words is "thirty-one million, five hundred sixteen thousand, sixty-four".