513257224 has 8 divisors (see below), whose sum is σ = 962357310. Its totient is φ = 256628608.

The previous prime is 513257221. The next prime is 513257231. The reversal of 513257224 is 422752315.

It can be written as a sum of positive squares in only one way, i.e., 381420900 + 131836324 = 19530^2 + 11482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (513257221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078569 + ... + 32078584.

Almost surely, 2^513257224 is an apocalyptic number.

It is an amenable number.

513257224 is a deficient number, since it is larger than the sum of its proper divisors (449100086).

513257224 is a wasteful number, since it uses less digits than its factorization.

513257224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64157159 (or 64157155 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 513257224 is about 22655.1809527092. The cubic root of 513257224 is about 800.6542689360.

The spelling of 513257224 in words is "five hundred thirteen million, two hundred fifty-seven thousand, two hundred twenty-four".