52518331 has 4 divisors (see below), whose sum is σ = 53183200. Its totient is φ = 51853464.

The previous prime is 52518313. The next prime is 52518343. The reversal of 52518331 is 13381525.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52518331 - 2⁹ = 52517819 is a prime.

It is a super-2 number, since 2×52518331² = 5516350182051122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52518331.

It is not an unprimeable number, because it can be changed into a prime (52518731) 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, 332316 + ... + 332473.

It is an arithmetic number, because the mean of its divisors is an integer number (13295800).

Almost surely, 2^52518331 is an apocalyptic number.

52518331 is a deficient number, since it is larger than the sum of its proper divisors (664869).

52518331 is an equidigital number, since it uses as much as digits as its factorization.

52518331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664868.

The product of its digits is 3600, while the sum is 28.

The square root of 52518331 is about 7246.9532218719. The cubic root of 52518331 is about 374.4871947721.

Adding to 52518331 its reverse (13381525), we get a palindrome (65899856).

The spelling of 52518331 in words is "fifty-two million, five hundred eighteen thousand, three hundred thirty-one".