556221051 has 12 divisors (see below), whose sum is σ = 806972712. Its totient is φ = 369179136.

The previous prime is 556221049. The next prime is 556221053. The reversal of 556221051 is 150122655.

556221051 is a `hidden beast` number, since 556 + 2 + 2 + 105 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (556221049) and next prime (556221053).

It is not a de Polignac number, because 556221051 - 2¹ = 556221049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556221053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134086 + ... + 138171.

It is an arithmetic number, because the mean of its divisors is an integer number (67247726).

Almost surely, 2^556221051 is an apocalyptic number.

556221051 is a deficient number, since it is larger than the sum of its proper divisors (250751661).

556221051 is a wasteful number, since it uses less digits than its factorization.

556221051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272490 (or 272487 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 556221051 is about 23584.3391045838. The cubic root of 556221051 is about 822.3988110412.

The spelling of 556221051 in words is "five hundred fifty-six million, two hundred twenty-one thousand, fifty-one".