513645388 has 6 divisors (see below), whose sum is σ = 898879436. Its totient is φ = 256822692.

The previous prime is 513645371. The next prime is 513645403. The reversal of 513645388 is 883546315.

It is a super-2 number, since 2×513645388² = 527663169227341088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64205670 + ... + 64205677.

Almost surely, 2^513645388 is an apocalyptic number.

It is an amenable number.

513645388 is a deficient number, since it is larger than the sum of its proper divisors (385234048).

513645388 is a wasteful number, since it uses less digits than its factorization.

513645388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128411351 (or 128411349 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 513645388 is about 22663.7461157682. The cubic root of 513645388 is about 800.8560565489.

The spelling of 513645388 in words is "five hundred thirteen million, six hundred forty-five thousand, three hundred eighty-eight".