513634361 has 4 divisors (see below), whose sum is σ = 513876852. Its totient is φ = 513391872.

The previous prime is 513634349. The next prime is 513634369. The reversal of 513634361 is 163436315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 262602025 + 251032336 = 16205^2 + 15844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513634361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513634369) 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, 118040 + ... + 122313.

It is an arithmetic number, because the mean of its divisors is an integer number (128469213).

Almost surely, 2^513634361 is an apocalyptic number.

It is an amenable number.

513634361 is a deficient number, since it is larger than the sum of its proper divisors (242491).

513634361 is a wasteful number, since it uses less digits than its factorization.

513634361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242490.

The product of its digits is 19440, while the sum is 32.

The square root of 513634361 is about 22663.5028404702. The cubic root of 513634361 is about 800.8503255503.

The spelling of 513634361 in words is "five hundred thirteen million, six hundred thirty-four thousand, three hundred sixty-one".