555221872 has 20 divisors (see below), whose sum is σ = 1087832160. Its totient is φ = 274491008.

The previous prime is 555221869. The next prime is 555221879. The reversal of 555221872 is 278122555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555221879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193528 + ... + 196375.

It is an arithmetic number, because the mean of its divisors is an integer number (54391608).

Almost surely, 2^555221872 is an apocalyptic number.

It is an amenable number.

555221872 is a deficient number, since it is larger than the sum of its proper divisors (532610288).

555221872 is a wasteful number, since it uses less digits than its factorization.

555221872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390000 (or 389994 counting only the distinct ones).

The product of its digits is 56000, while the sum is 37.

The square root of 555221872 is about 23563.1464791950. The cubic root of 555221872 is about 821.9060715978.

The spelling of 555221872 in words is "five hundred fifty-five million, two hundred twenty-one thousand, eight hundred seventy-two".