556331101 has 2 divisors, whose sum is σ = 556331102. Its totient is φ = 556331100.

The previous prime is 556331093. The next prime is 556331117. The reversal of 556331101 is 101133655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538472025 + 17859076 = 23205^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 556331101 - 2³ = 556331093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556331131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278165550 + 278165551.

It is an arithmetic number, because the mean of its divisors is an integer number (278165551).

Almost surely, 2^556331101 is an apocalyptic number.

It is an amenable number.

556331101 is a deficient number, since it is larger than the sum of its proper divisors (1).

556331101 is an equidigital number, since it uses as much as digits as its factorization.

556331101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 556331101 is about 23586.6721052377. The cubic root of 556331101 is about 822.4530454867.

Adding to 556331101 its reverse (101133655), we get a palindrome (657464756).

The spelling of 556331101 in words is "five hundred fifty-six million, three hundred thirty-one thousand, one hundred one".