52356021 has 4 divisors (see below), whose sum is σ = 69808032. Its totient is φ = 34904012.

The previous prime is 52356019. The next prime is 52356043. The reversal of 52356021 is 12065325.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52356021 - 2¹ = 52356019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52355982 and 52356000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52356061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8726001 + ... + 8726006.

It is an arithmetic number, because the mean of its divisors is an integer number (17452008).

Almost surely, 2^52356021 is an apocalyptic number.

It is an amenable number.

52356021 is a deficient number, since it is larger than the sum of its proper divisors (17452011).

52356021 is a wasteful number, since it uses less digits than its factorization.

52356021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17452010.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 52356021 is about 7235.7460569039. The cubic root of 52356021 is about 374.1010074441.

The spelling of 52356021 in words is "fifty-two million, three hundred fifty-six thousand, twenty-one".