513182947 has 4 divisors (see below), whose sum is σ = 515842120. Its totient is φ = 510523776.

The previous prime is 513182903. The next prime is 513182953. The reversal of 513182947 is 749281315.

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

It is a cyclic number.

It is not a de Polignac number, because 513182947 - 2¹⁵ = 513150179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513185947) 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, 1329297 + ... + 1329682.

It is an arithmetic number, because the mean of its divisors is an integer number (128960530).

Almost surely, 2^513182947 is an apocalyptic number.

513182947 is a deficient number, since it is larger than the sum of its proper divisors (2659173).

513182947 is a wasteful number, since it uses less digits than its factorization.

513182947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659172.

The product of its digits is 60480, while the sum is 40.

The square root of 513182947 is about 22653.5415994939. The cubic root of 513182947 is about 800.6156443352.

The spelling of 513182947 in words is "five hundred thirteen million, one hundred eighty-two thousand, nine hundred forty-seven".