52355621 has 16 divisors (see below), whose sum is σ = 57507840. Its totient is φ = 47478960.

The previous prime is 52355593. The next prime is 52355627. The reversal of 52355621 is 12655325.

It is a happy number.

52355621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 52355621 - 2⁶ = 52355557 is a prime.

It is a super-2 number, since 2×52355621² = 5482222100591282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52355627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 60236 + ... + 61098.

It is an arithmetic number, because the mean of its divisors is an integer number (3594240).

Almost surely, 2^52355621 is an apocalyptic number.

It is an amenable number.

52355621 is a deficient number, since it is larger than the sum of its proper divisors (5152219).

52355621 is a wasteful number, since it uses less digits than its factorization.

52355621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its digits is 9000, while the sum is 29.

The square root of 52355621 is about 7235.7184163012. The cubic root of 52355621 is about 374.1000547311.

The spelling of 52355621 in words is "fifty-two million, three hundred fifty-five thousand, six hundred twenty-one".