64313520 has 160 divisors (see below), whose sum is σ = 212557824. Its totient is φ = 16051200.

The previous prime is 64313519. The next prime is 64313563. The reversal of 64313520 is 2531346.

It is a happy number.

64313520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 336625 + ... + 336815.

Almost surely, 2^64313520 is an apocalyptic number.

64313520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64313520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106278912).

64313520 is an abundant number, since it is smaller than the sum of its proper divisors (148244304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64313520 is a wasteful number, since it uses less digits than its factorization.

64313520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 64313520 is about 8019.5710608486. The cubic root of 64313520 is about 400.6521029932.

Adding to 64313520 its reverse (2531346), we get a palindrome (66844866).

The spelling of 64313520 in words is "sixty-four million, three hundred thirteen thousand, five hundred twenty".