556131601 has 2 divisors, whose sum is σ = 556131602. Its totient is φ = 556131600.

The previous prime is 556131547. The next prime is 556131607. The reversal of 556131601 is 106131655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 341362576 + 214769025 = 18476^2 + 14655^2 .

It is a cyclic number.

It is not a de Polignac number, because 556131601 - 2⁷ = 556131473 is a prime.

It is equal to p_29150119 and since 556131601 and 29150119 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556131601.

It is not a weakly prime, because it can be changed into another prime (556131607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278065800 + 278065801.

It is an arithmetic number, because the mean of its divisors is an integer number (278065801).

Almost surely, 2^556131601 is an apocalyptic number.

It is an amenable number.

556131601 is a deficient number, since it is larger than the sum of its proper divisors (1).

556131601 is an equidigital number, since it uses as much as digits as its factorization.

556131601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 556131601 is about 23582.4426427798. The cubic root of 556131601 is about 822.3547233430.

The spelling of 556131601 in words is "five hundred fifty-six million, one hundred thirty-one thousand, six hundred one".