507813561 has 12 divisors (see below), whose sum is σ = 734406192. Its totient is φ = 338128056.

The previous prime is 507813541. The next prime is 507813563. The reversal of 507813561 is 165318705.

It is not a de Polignac number, because 507813561 - 2¹³ = 507805369 is a prime.

It is a super-2 number, since 2×507813561² = 515749225471001442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (507813563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26671 + ... + 41556.

It is an arithmetic number, because the mean of its divisors is an integer number (61200516).

Almost surely, 2^507813561 is an apocalyptic number.

It is an amenable number.

507813561 is a deficient number, since it is larger than the sum of its proper divisors (226592631).

507813561 is a wasteful number, since it uses less digits than its factorization.

507813561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69060 (or 69057 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 507813561 is about 22534.7190131140. The cubic root of 507813561 is about 797.8135929950.

The spelling of 507813561 in words is "five hundred seven million, eight hundred thirteen thousand, five hundred sixty-one".