642527224 has 64 divisors (see below), whose sum is σ = 1264435200. Its totient is φ = 305869824.

The previous prime is 642527191. The next prime is 642527231. The reversal of 642527224 is 422725246.

It is a super-2 number, since 2×642527224² = 825682467162292352, which contains 22 as substring.

Its product of digits (53760) is a multiple of the sum of its prime divisors (448).

It is a self number, because there is not a number n which added to its sum of digits gives 642527224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2881177 + ... + 2881399.

It is an arithmetic number, because the mean of its divisors is an integer number (19756800).

Almost surely, 2^642527224 is an apocalyptic number.

It is an amenable number.

642527224 is a deficient number, since it is larger than the sum of its proper divisors (621907976).

642527224 is a wasteful number, since it uses less digits than its factorization.

642527224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 448 counting only the distinct ones).

The product of its digits is 53760, while the sum is 34.

The square root of 642527224 is about 25348.1207192959. The cubic root of 642527224 is about 862.9067068524.

The spelling of 642527224 in words is "six hundred forty-two million, five hundred twenty-seven thousand, two hundred twenty-four".