513906625 has 8 divisors (see below), whose sum is σ = 641355624. Its totient is φ = 411125200.

The previous prime is 513906553. The next prime is 513906629. The reversal of 513906625 is 526609315.

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 507510784 = 2529^2 + 22528^2 .

It is a de Polignac number, because none of the positive numbers 2^k-513906625 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513906629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055502 + ... + 2055751.

It is an arithmetic number, because the mean of its divisors is an integer number (80169453).

Almost surely, 2^513906625 is an apocalyptic number.

It is an amenable number.

513906625 is a deficient number, since it is larger than the sum of its proper divisors (127448999).

513906625 is an equidigital number, since it uses as much as digits as its factorization.

513906625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111268 (or 4111258 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 513906625 is about 22669.5087066306. The cubic root of 513906625 is about 800.9918037527.

The spelling of 513906625 in words is "five hundred thirteen million, nine hundred six thousand, six hundred twenty-five".