513642365 has 4 divisors (see below), whose sum is σ = 616370844. Its totient is φ = 410913888.

The previous prime is 513642361. The next prime is 513642427. The reversal of 513642365 is 563246315.

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 201554809 + 312087556 = 14197^2 + 17666^2 .

It is a cyclic number.

It is not a de Polignac number, because 513642365 - 2² = 513642361 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513642361) 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, 51364232 + ... + 51364241.

It is an arithmetic number, because the mean of its divisors is an integer number (154092711).

Almost surely, 2^513642365 is an apocalyptic number.

It is an amenable number.

513642365 is a deficient number, since it is larger than the sum of its proper divisors (102728479).

513642365 is a wasteful number, since it uses less digits than its factorization.

513642365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102728478.

The product of its digits is 64800, while the sum is 35.

The square root of 513642365 is about 22663.6794232534. The cubic root of 513642365 is about 800.8544854309.

The spelling of 513642365 in words is "five hundred thirteen million, six hundred forty-two thousand, three hundred sixty-five".