517149620 has 48 divisors (see below), whose sum is σ = 1191652560. Its totient is φ = 187339776.

The previous prime is 517149613. The next prime is 517149623. The reversal of 517149620 is 26941715.

It can be written as a sum of positive squares in 8 ways, for example, as 102131236 + 415018384 = 10106^2 + 20372^2 .

It is a super-2 number, since 2×517149620² = 534887458932288800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517149623) 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, 4985 + ... + 32544.

It is an arithmetic number, because the mean of its divisors is an integer number (24826095).

Almost surely, 2^517149620 is an apocalyptic number.

It is an amenable number.

517149620 is an abundant number, since it is smaller than the sum of its proper divisors (674502940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517149620 is a wasteful number, since it uses less digits than its factorization.

517149620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37604 (or 37602 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 517149620 is about 22740.9239038347. The cubic root of 517149620 is about 802.6731516267.

The spelling of 517149620 in words is "five hundred seventeen million, one hundred forty-nine thousand, six hundred twenty".