513234665 has 4 divisors (see below), whose sum is σ = 615881604. Its totient is φ = 410587728.

The previous prime is 513234649. The next prime is 513234737. The reversal of 513234665 is 566432315.

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 375313129 + 137921536 = 19373^2 + 11744^2 .

It is a cyclic number.

It is not a de Polignac number, because 513234665 - 2⁴ = 513234649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51323462 + ... + 51323471.

It is an arithmetic number, because the mean of its divisors is an integer number (153970401).

Almost surely, 2^513234665 is an apocalyptic number.

It is an amenable number.

513234665 is a deficient number, since it is larger than the sum of its proper divisors (102646939).

513234665 is a wasteful number, since it uses less digits than its factorization.

513234665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102646938.

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

The square root of 513234665 is about 22654.6830699527. The cubic root of 513234665 is about 800.6425384797.

The spelling of 513234665 in words is "five hundred thirteen million, two hundred thirty-four thousand, six hundred sixty-five".