556682261 has 2 divisors, whose sum is σ = 556682262. Its totient is φ = 556682260.

The previous prime is 556682251. The next prime is 556682281. The reversal of 556682261 is 162286655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524135236 + 32547025 = 22894^2 + 5705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556682261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556682201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278341130 + 278341131.

It is an arithmetic number, because the mean of its divisors is an integer number (278341131).

Almost surely, 2^556682261 is an apocalyptic number.

It is an amenable number.

556682261 is a deficient number, since it is larger than the sum of its proper divisors (1).

556682261 is an equidigital number, since it uses as much as digits as its factorization.

556682261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 41.

The square root of 556682261 is about 23594.1149653891. The cubic root of 556682261 is about 822.6260550880.

The spelling of 556682261 in words is "five hundred fifty-six million, six hundred eighty-two thousand, two hundred sixty-one".