52564421 has 16 divisors (see below), whose sum is σ = 64915200. Its totient is φ = 41447808.

The previous prime is 52564399. The next prime is 52564423. The reversal of 52564421 is 12446525.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52564421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52564423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31865 + ... + 33473.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^52564421 is an apocalyptic number.

It is an amenable number.

52564421 is a deficient number, since it is larger than the sum of its proper divisors (12350779).

52564421 is a wasteful number, since it uses less digits than its factorization.

52564421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988.

The product of its digits is 9600, while the sum is 29.

The square root of 52564421 is about 7250.1324815482. The cubic root of 52564421 is about 374.5967125208.

It can be divided in two parts, 525 and 64421, that added together give a palindrome (64946).

The spelling of 52564421 in words is "fifty-two million, five hundred sixty-four thousand, four hundred twenty-one".