517391044 has 12 divisors (see below), whose sum is σ = 907717804. Its totient is φ = 258043104.

The previous prime is 517391029. The next prime is 517391047. The reversal of 517391044 is 440193715.

It can be written as a sum of positive squares in 2 ways, for example, as 175880644 + 341510400 = 13262^2 + 18480^2 .

It is a super-2 number, since 2×517391044² = 535386984822819872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (517391047) 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, 161319 + ... + 164494.

Almost surely, 2^517391044 is an apocalyptic number.

It is an amenable number.

517391044 is a deficient number, since it is larger than the sum of its proper divisors (390326760).

517391044 is a wasteful number, since it uses less digits than its factorization.

517391044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326214 (or 326212 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 517391044 is about 22746.2314241283. The cubic root of 517391044 is about 802.7980377384.

The spelling of 517391044 in words is "five hundred seventeen million, three hundred ninety-one thousand, forty-four".