513640552 has 8 divisors (see below), whose sum is σ = 963076050. Its totient is φ = 256820272.

The previous prime is 513640529. The next prime is 513640571. The reversal of 513640552 is 255046315.

It can be written as a sum of positive squares in only one way, i.e., 512841316 + 799236 = 22646^2 + 894^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32102527 + ... + 32102542.

Almost surely, 2^513640552 is an apocalyptic number.

It is an amenable number.

513640552 is a deficient number, since it is larger than the sum of its proper divisors (449435498).

513640552 is a wasteful number, since it uses less digits than its factorization.

513640552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64205075 (or 64205071 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 513640552 is about 22663.6394252997. The cubic root of 513640552 is about 800.8535431729.

Adding to 513640552 its reverse (255046315), we get a palindrome (768686867).

The spelling of 513640552 in words is "five hundred thirteen million, six hundred forty thousand, five hundred fifty-two".