513115236 has 30 divisors (see below), whose sum is σ = 1341385430. Its totient is φ = 171038304.

The previous prime is 513115231. The next prime is 513115277. The reversal of 513115236 is 632511315.

513115236 is a `hidden beast` number, since 5 + 131 + 1 + 523 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 421070400 + 92044836 = 20520^2 + 9594^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (513115231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 791521 + ... + 792168.

Almost surely, 2^513115236 is an apocalyptic number.

It is an amenable number.

513115236 is an abundant number, since it is smaller than the sum of its proper divisors (828270194).

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

513115236 is a wasteful number, since it uses less digits than its factorization.

513115236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583705 (or 1583694 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 513115236 is about 22652.0470598134. The cubic root of 513115236 is about 800.5804308565.

The spelling of 513115236 in words is "five hundred thirteen million, one hundred fifteen thousand, two hundred thirty-six".