52522421 has 4 divisors (see below), whose sum is σ = 60025632. Its totient is φ = 45019212.

The previous prime is 52522411. The next prime is 52522433. The reversal of 52522421 is 12422525.

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 de Polignac number, because none of the positive numbers 2^k-52522421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52522411) 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, 3751595 + ... + 3751608.

It is an arithmetic number, because the mean of its divisors is an integer number (15006408).

Almost surely, 2^52522421 is an apocalyptic number.

It is an amenable number.

52522421 is a deficient number, since it is larger than the sum of its proper divisors (7503211).

52522421 is an equidigital number, since it uses as much as digits as its factorization.

52522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7503210.

The product of its digits is 1600, while the sum is 23.

The square root of 52522421 is about 7247.2354039316. The cubic root of 52522421 is about 374.4969159040.

Adding to 52522421 its reverse (12422525), we get a palindrome (64944946).

The spelling of 52522421 in words is "fifty-two million, five hundred twenty-two thousand, four hundred twenty-one".