64520224 has 24 divisors (see below), whose sum is σ = 130124988. Its totient is φ = 31472640.

The previous prime is 64520189. The next prime is 64520231. The reversal of 64520224 is 42202546.

It can be written as a sum of positive squares in 2 ways, for example, as 52823824 + 11696400 = 7268^2 + 3420^2 .

It is a super-3 number, since 3×64520224³ (a number of 24 digits) contains 333 as substring.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23277 + ... + 25900.

Almost surely, 2^64520224 is an apocalyptic number.

It is an amenable number.

64520224 is an abundant number, since it is smaller than the sum of its proper divisors (65604764).

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

64520224 is a wasteful number, since it uses less digits than its factorization.

64520224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49228 (or 49220 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 64520224 is about 8032.4481946664. The cubic root of 64520224 is about 401.0808766335.

The spelling of 64520224 in words is "sixty-four million, five hundred twenty thousand, two hundred twenty-four".