556639225 has 6 divisors (see below), whose sum is σ = 690232670. Its totient is φ = 445311360.

The previous prime is 556639207. The next prime is 556639229. The reversal of 556639225 is 522936655.

It can be written as a sum of positive squares in 3 ways, for example, as 10061584 + 546577641 = 3172^2 + 23379^2 .

It is not a de Polignac number, because 556639225 - 2⁹ = 556638713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556639229) 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, 11132760 + ... + 11132809.

Almost surely, 2^556639225 is an apocalyptic number.

It is an amenable number.

556639225 is a deficient number, since it is larger than the sum of its proper divisors (133593445).

556639225 is a wasteful number, since it uses less digits than its factorization.

556639225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22265579 (or 22265574 counting only the distinct ones).

The product of its digits is 486000, while the sum is 43.

The square root of 556639225 is about 23593.2029406776. The cubic root of 556639225 is about 822.6048560129.

The spelling of 556639225 in words is "five hundred fifty-six million, six hundred thirty-nine thousand, two hundred twenty-five".