516522621 has 16 divisors (see below), whose sum is σ = 707860224. Its totient is φ = 334860864.

The previous prime is 516522613. The next prime is 516522623. The reversal of 516522621 is 126225615.

It is not a de Polignac number, because 516522621 - 2³ = 516522613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516522623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10471 + ... + 33803.

It is an arithmetic number, because the mean of its divisors is an integer number (44241264).

Almost surely, 2^516522621 is an apocalyptic number.

It is an amenable number.

516522621 is a deficient number, since it is larger than the sum of its proper divisors (191337603).

516522621 is a wasteful number, since it uses less digits than its factorization.

516522621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23540.

The product of its digits is 7200, while the sum is 30.

The square root of 516522621 is about 22727.1340252131. The cubic root of 516522621 is about 802.3486299451.

It can be divided in two parts, 5 and 16522621, that added together give a triangular number (16522626 = T₅₇₄₈).

The spelling of 516522621 in words is "five hundred sixteen million, five hundred twenty-two thousand, six hundred twenty-one".