220261556 has 12 divisors (see below), whose sum is σ = 385600068. Its totient is φ = 110090112.

The previous prime is 220261549. The next prime is 220261567. The reversal of 220261556 is 655162022.

It can be written as a sum of positive squares in 2 ways, for example, as 79032100 + 141229456 = 8890^2 + 11884^2 .

It is a super-2 number, since 2×220261556² = 97030306103082272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4310 + ... + 21426.

It is an arithmetic number, because the mean of its divisors is an integer number (32133339).

Almost surely, 2^220261556 is an apocalyptic number.

It is an amenable number.

220261556 is a deficient number, since it is larger than the sum of its proper divisors (165338512).

220261556 is a wasteful number, since it uses less digits than its factorization.

220261556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20338 (or 20336 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 220261556 is about 14841.2114060814. The cubic root of 220261556 is about 603.9202159136.

The spelling of 220261556 in words is "two hundred twenty million, two hundred sixty-one thousand, five hundred fifty-six".