556223761 has 2 divisors, whose sum is σ = 556223762. Its totient is φ = 556223760.

The previous prime is 556223747. The next prime is 556223777. The reversal of 556223761 is 167322655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423536400 + 132687361 = 20580^2 + 11519^2 .

It is a cyclic number.

It is not a de Polignac number, because 556223761 - 2²¹ = 554126609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556223761.

It is not a weakly prime, because it can be changed into another prime (556223861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278111880 + 278111881.

It is an arithmetic number, because the mean of its divisors is an integer number (278111881).

Almost surely, 2^556223761 is an apocalyptic number.

It is an amenable number.

556223761 is a deficient number, since it is larger than the sum of its proper divisors (1).

556223761 is an equidigital number, since it uses as much as digits as its factorization.

556223761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 556223761 is about 23584.3965578940. The cubic root of 556223761 is about 822.4001466596.

The spelling of 556223761 in words is "five hundred fifty-six million, two hundred twenty-three thousand, seven hundred sixty-one".