556155220 has 24 divisors (see below), whose sum is σ = 1168448904. Its totient is φ = 222362496.

The previous prime is 556155217. The next prime is 556155233. The reversal of 556155220 is 22551655.

It can be written as a sum of positive squares in 4 ways, for example, as 134838544 + 421316676 = 11612^2 + 20526^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53574 + ... + 63106.

It is an arithmetic number, because the mean of its divisors is an integer number (48685371).

Almost surely, 2^556155220 is an apocalyptic number.

It is an amenable number.

556155220 is an abundant number, since it is smaller than the sum of its proper divisors (612293684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556155220 is a wasteful number, since it uses less digits than its factorization.

556155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12459 (or 12457 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 556155220 is about 23582.9434125598. The cubic root of 556155220 is about 822.3663650247.

The spelling of 556155220 in words is "five hundred fifty-six million, one hundred fifty-five thousand, two hundred twenty".