516442725 has 18 divisors (see below), whose sum is σ = 925006706. Its totient is φ = 275436000.

The previous prime is 516442723. The next prime is 516442739. The reversal of 516442725 is 527244615.

It is a happy number.

516442725 is a `hidden beast` number, since 5 + 1 + 644 + 2 + 7 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 131262849 + 385179876 = 11457^2 + 19626^2 .

It is not a de Polignac number, because 516442725 - 2¹ = 516442723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516442725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516442723) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1147426 + ... + 1147875.

Almost surely, 2^516442725 is an apocalyptic number.

It is an amenable number.

516442725 is a deficient number, since it is larger than the sum of its proper divisors (408563981).

516442725 is a wasteful number, since it uses less digits than its factorization.

516442725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295317 (or 2295309 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 516442725 is about 22725.3762345093. The cubic root of 516442725 is about 802.3072585710.

The spelling of 516442725 in words is "five hundred sixteen million, four hundred forty-two thousand, seven hundred twenty-five".