53244621 has 20 divisors (see below), whose sum is σ = 81393312. Its totient is φ = 34668648.

The previous prime is 53244619. The next prime is 53244641. The reversal of 53244621 is 12644235.

53244621 is a `hidden beast` number, since 5 + 32 + 4 + 4 + 621 = 666.

It is not a de Polignac number, because 53244621 - 2¹ = 53244619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53244601) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4161 + ... + 11126.

Almost surely, 2^53244621 is an apocalyptic number.

It is an amenable number.

53244621 is a deficient number, since it is larger than the sum of its proper divisors (28148691).

53244621 is a wasteful number, since it uses less digits than its factorization.

53244621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15342 (or 15333 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 53244621 is about 7296.8911873482. The cubic root of 53244621 is about 376.2055919744.

Adding to 53244621 its reverse (12644235), we get a palindrome (65888856).

The spelling of 53244621 in words is "fifty-three million, two hundred forty-four thousand, six hundred twenty-one".