52851621 has 16 divisors (see below), whose sum is σ = 72990720. Its totient is φ = 33981360.

The previous prime is 52851611. The next prime is 52851647. The reversal of 52851621 is 12615825.

It is not a de Polignac number, because 52851621 - 2¹⁵ = 52818853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52851611) 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, 32596 + ... + 34178.

It is an arithmetic number, because the mean of its divisors is an integer number (4561920).

Almost surely, 2^52851621 is an apocalyptic number.

It is an amenable number.

52851621 is a deficient number, since it is larger than the sum of its proper divisors (20139099).

52851621 is a wasteful number, since it uses less digits than its factorization.

52851621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976.

The product of its digits is 4800, while the sum is 30.

The square root of 52851621 is about 7269.9120352312. The cubic root of 52851621 is about 375.2777107317.

The spelling of 52851621 in words is "fifty-two million, eight hundred fifty-one thousand, six hundred twenty-one".