52523021 has 4 divisors (see below), whose sum is σ = 54217344. Its totient is φ = 50828700.

The previous prime is 52522993. The next prime is 52523027. The reversal of 52523021 is 12032525.

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 52523021 - 2¹⁸ = 52260877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52522984 and 52523002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52523027) 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, 847115 + ... + 847176.

It is an arithmetic number, because the mean of its divisors is an integer number (13554336).

Almost surely, 2^52523021 is an apocalyptic number.

It is an amenable number.

52523021 is a deficient number, since it is larger than the sum of its proper divisors (1694323).

52523021 is a wasteful number, since it uses less digits than its factorization.

52523021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694322.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 52523021 is about 7247.2767989087. The cubic root of 52523021 is about 374.4983419445.

Adding to 52523021 its reverse (12032525), we get a palindrome (64555546).

The spelling of 52523021 in words is "fifty-two million, five hundred twenty-three thousand, twenty-one".