513653861 has 12 divisors (see below), whose sum is σ = 623598048. Its totient is φ = 414374592.

The previous prime is 513653857. The next prime is 513653879. The reversal of 513653861 is 168356315.

It is not a de Polignac number, because 513653861 - 2² = 513653857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513653851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124931 + ... + 128976.

It is an arithmetic number, because the mean of its divisors is an integer number (51966504).

Almost surely, 2^513653861 is an apocalyptic number.

It is an amenable number.

513653861 is a deficient number, since it is larger than the sum of its proper divisors (109944187).

513653861 is a wasteful number, since it uses less digits than its factorization.

513653861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253948 (or 253931 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 513653861 is about 22663.9330434945. The cubic root of 513653861 is about 800.8604601162.

The spelling of 513653861 in words is "five hundred thirteen million, six hundred fifty-three thousand, eight hundred sixty-one".