52216979 has 4 divisors (see below), whose sum is σ = 55288584. Its totient is φ = 49145376.

The previous prime is 52216951. The next prime is 52216987. The reversal of 52216979 is 97961225.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52216979 is a prime.

It is a super-2 number, since 2×52216979² = 5453225791772882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52216999) 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, 1535777 + ... + 1535810.

It is an arithmetic number, because the mean of its divisors is an integer number (13822146).

Almost surely, 2^52216979 is an apocalyptic number.

52216979 is a deficient number, since it is larger than the sum of its proper divisors (3071605).

52216979 is a wasteful number, since it uses less digits than its factorization.

52216979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071604.

The product of its digits is 68040, while the sum is 41.

The square root of 52216979 is about 7226.1316760768. The cubic root of 52216979 is about 373.7695468948.

The spelling of 52216979 in words is "fifty-two million, two hundred sixteen thousand, nine hundred seventy-nine".