513250661 has 24 divisors (see below), whose sum is σ = 649176192. Its totient is φ = 397188000.

The previous prime is 513250657. The next prime is 513250679. The reversal of 513250661 is 166052315.

It is not a de Polignac number, because 513250661 - 2² = 513250657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513250861) 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 in 23 ways as a sum of consecutive naturals, for example, 125891 + ... + 129903.

It is an arithmetic number, because the mean of its divisors is an integer number (27049008).

Almost surely, 2^513250661 is an apocalyptic number.

It is an amenable number.

513250661 is a deficient number, since it is larger than the sum of its proper divisors (135925531).

513250661 is a wasteful number, since it uses less digits than its factorization.

513250661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 513250661 is about 22655.0361067909. The cubic root of 513250661 is about 800.6508562765.

The spelling of 513250661 in words is "five hundred thirteen million, two hundred fifty thousand, six hundred sixty-one".