516634521 has 36 divisors (see below), whose sum is σ = 760545072. Its totient is φ = 311804064.

The previous prime is 516634511. The next prime is 516634523. The reversal of 516634521 is 125436615.

It is not a de Polignac number, because 516634521 - 2⁶ = 516634457 is a prime.

It is a super-2 number, since 2×516634521² = 533822456577798882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (516634523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2275810 + ... + 2276036.

It is an arithmetic number, because the mean of its divisors is an integer number (21126252).

Almost surely, 2^516634521 is an apocalyptic number.

It is an amenable number.

516634521 is a deficient number, since it is larger than the sum of its proper divisors (243910551).

516634521 is a wasteful number, since it uses less digits than its factorization.

516634521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 310 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 516634521 is about 22729.5957069192. The cubic root of 516634521 is about 802.4065663098.

The spelling of 516634521 in words is "five hundred sixteen million, six hundred thirty-four thousand, five hundred twenty-one".