52218689 has 8 divisors (see below), whose sum is σ = 53125800. Its totient is φ = 51319296.

The previous prime is 52218653. The next prime is 52218697. The reversal of 52218689 is 98681225.

It can be written as a sum of positive squares in 4 ways, for example, as 2755600 + 49463089 = 1660^2 + 7033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52218689 - 2²⁴ = 35441473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52218619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12647 + ... + 16259.

It is an arithmetic number, because the mean of its divisors is an integer number (6640725).

Almost surely, 2^52218689 is an apocalyptic number.

It is an amenable number.

52218689 is a deficient number, since it is larger than the sum of its proper divisors (907111).

52218689 is a wasteful number, since it uses less digits than its factorization.

52218689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859.

The product of its digits is 69120, while the sum is 41.

The square root of 52218689 is about 7226.2499956755. The cubic root of 52218689 is about 373.7736269147.

The spelling of 52218689 in words is "fifty-two million, two hundred eighteen thousand, six hundred eighty-nine".