52216517 has 4 divisors (see below), whose sum is σ = 52995936. Its totient is φ = 51437100.

The previous prime is 52216513. The next prime is 52216529. The reversal of 52216517 is 71561225.

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 52216517 - 2² = 52216513 is a prime.

It is a super-2 number, since 2×52216517² = 5453129295222578, 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 52216517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52216511) 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, 389609 + ... + 389742.

It is an arithmetic number, because the mean of its divisors is an integer number (13248984).

Almost surely, 2^52216517 is an apocalyptic number.

It is an amenable number.

52216517 is a deficient number, since it is larger than the sum of its proper divisors (779419).

52216517 is an equidigital number, since it uses as much as digits as its factorization.

52216517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779418.

The product of its digits is 4200, while the sum is 29.

The square root of 52216517 is about 7226.0997086949. The cubic root of 52216517 is about 373.7684445583.

The spelling of 52216517 in words is "fifty-two million, two hundred sixteen thousand, five hundred seventeen".