556121137 has 16 divisors (see below), whose sum is σ = 671009472. Its totient is φ = 454057920.

The previous prime is 556121099. The next prime is 556121141. The reversal of 556121137 is 731121655.

It is a cyclic number.

It is not a de Polignac number, because 556121137 - 2⁷ = 556121009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556121099 and 556121108.

It is not an unprimeable number, because it can be changed into a prime (556121177) 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 in 15 ways as a sum of consecutive naturals, for example, 47263 + ... + 57844.

It is an arithmetic number, because the mean of its divisors is an integer number (41938092).

Almost surely, 2^556121137 is an apocalyptic number.

It is an amenable number.

556121137 is a deficient number, since it is larger than the sum of its proper divisors (114888335).

556121137 is a wasteful number, since it uses less digits than its factorization.

556121137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105168.

The product of its digits is 6300, while the sum is 31.

The square root of 556121137 is about 23582.2207817669. The cubic root of 556121137 is about 822.3495655867.

The spelling of 556121137 in words is "five hundred fifty-six million, one hundred twenty-one thousand, one hundred thirty-seven".