511820725 has 54 divisors (see below), whose sum is σ = 721548870. Its totient is φ = 359948160.

The previous prime is 511820711. The next prime is 511820767. The reversal of 511820725 is 527028115.

It can be written as a sum of positive squares in 9 ways, for example, as 194909521 + 316911204 = 13961^2 + 17802^2 .

It is not a de Polignac number, because 511820725 - 2⁹ = 511820213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2234911 + ... + 2235139.

Almost surely, 2^511820725 is an apocalyptic number.

It is an amenable number.

511820725 is a deficient number, since it is larger than the sum of its proper divisors (209728145).

511820725 is a wasteful number, since it uses less digits than its factorization.

511820725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 511820725 is about 22623.4551958802. The cubic root of 511820725 is about 799.9066167040.

The spelling of 511820725 in words is "five hundred eleven million, eight hundred twenty thousand, seven hundred twenty-five".