556221872 has 10 divisors (see below), whose sum is σ = 1077679908. Its totient is φ = 278110928.

The previous prime is 556221859. The next prime is 556221889. The reversal of 556221872 is 278122655.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17381918 + ... + 17381949.

Almost surely, 2^556221872 is an apocalyptic number.

It is an amenable number.

556221872 is a deficient number, since it is larger than the sum of its proper divisors (521458036).

556221872 is a wasteful number, since it uses less digits than its factorization.

556221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34763875 (or 34763869 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 556221872 is about 23584.3565101955. The cubic root of 556221872 is about 822.3992156699.

The spelling of 556221872 in words is "five hundred fifty-six million, two hundred twenty-one thousand, eight hundred seventy-two".