513660244 has 6 divisors (see below), whose sum is σ = 898905434. Its totient is φ = 256830120.

The previous prime is 513660239. The next prime is 513660247. The reversal of 513660244 is 442066315.

It can be written as a sum of positive squares in only one way, i.e., 417384900 + 96275344 = 20430^2 + 9812^2 .

It is a super-2 number, since 2×513660244² = 527693692532279072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513660247) by changing a digit.

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, 64207527 + ... + 64207534.

Almost surely, 2^513660244 is an apocalyptic number.

It is an amenable number.

513660244 is a deficient number, since it is larger than the sum of its proper divisors (385245190).

513660244 is a wasteful number, since it uses less digits than its factorization.

513660244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128415065 (or 128415063 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 513660244 is about 22664.0738615104. The cubic root of 513660244 is about 800.8637774417.

The spelling of 513660244 in words is "five hundred thirteen million, six hundred sixty thousand, two hundred forty-four".