64311513 has 24 divisors (see below), whose sum is σ = 100763712. Its totient is φ = 35740224.

The previous prime is 64311497. The next prime is 64311517. The reversal of 64311513 is 31511346.

It is not a de Polignac number, because 64311513 - 2⁴ = 64311497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64311517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27631 + ... + 29867.

It is an arithmetic number, because the mean of its divisors is an integer number (4198488).

Almost surely, 2^64311513 is an apocalyptic number.

It is an amenable number.

64311513 is a deficient number, since it is larger than the sum of its proper divisors (36452199).

64311513 is a wasteful number, since it uses less digits than its factorization.

64311513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2284 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 64311513 is about 8019.4459284916. The cubic root of 64311513 is about 400.6479352996.

Adding to 64311513 its reverse (31511346), we get a palindrome (95822859).

The spelling of 64311513 in words is "sixty-four million, three hundred eleven thousand, five hundred thirteen".