556151881 has 2 divisors, whose sum is σ = 556151882. Its totient is φ = 556151880.

The previous prime is 556151837. The next prime is 556151903. The reversal of 556151881 is 188151655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507375625 + 48776256 = 22525^2 + 6984^2 .

It is a cyclic number.

It is not a de Polignac number, because 556151881 - 2¹⁹ = 555627593 is a prime.

It is a super-2 number, since 2×556151881² = 618609829479676322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556151381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278075940 + 278075941.

It is an arithmetic number, because the mean of its divisors is an integer number (278075941).

Almost surely, 2^556151881 is an apocalyptic number.

It is an amenable number.

556151881 is a deficient number, since it is larger than the sum of its proper divisors (1).

556151881 is an equidigital number, since it uses as much as digits as its factorization.

556151881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 40.

The square root of 556151881 is about 23582.8726197637. The cubic root of 556151881 is about 822.3647192691.

The spelling of 556151881 in words is "five hundred fifty-six million, one hundred fifty-one thousand, eight hundred eighty-one".