556251697 has 6 divisors (see below), whose sum is σ = 576095078. Its totient is φ = 537069792.

The previous prime is 556251677. The next prime is 556251727. The reversal of 556251697 is 796152655.

It can be written as a sum of positive squares in 3 ways, for example, as 5363856 + 550887841 = 2316^2 + 23471^2 .

It is a de Polignac number, because none of the positive numbers 2^k-556251697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556251607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329868 + ... + 331549.

Almost surely, 2^556251697 is an apocalyptic number.

It is an amenable number.

556251697 is a deficient number, since it is larger than the sum of its proper divisors (19843381).

556251697 is an equidigital number, since it uses as much as digits as its factorization.

556251697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661475 (or 661446 counting only the distinct ones).

The product of its digits is 567000, while the sum is 46.

The square root of 556251697 is about 23584.9888064421. The cubic root of 556251697 is about 822.4139146114.

The spelling of 556251697 in words is "five hundred fifty-six million, two hundred fifty-one thousand, six hundred ninety-seven".