221655104 has 28 divisors (see below), whose sum is σ = 479834448. Its totient is φ = 100752000.

The previous prime is 221655103. The next prime is 221655107. The reversal of 221655104 is 401556122.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (221655103) 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, 156722 + ... + 158129.

Almost surely, 2^221655104 is an apocalyptic number.

It is an amenable number.

221655104 is an abundant number, since it is smaller than the sum of its proper divisors (258179344).

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

221655104 is a wasteful number, since it uses less digits than its factorization.

221655104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314874 (or 314864 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 221655104 is about 14888.0859750339. The cubic root of 221655104 is about 605.1911642338.

The spelling of 221655104 in words is "two hundred twenty-one million, six hundred fifty-five thousand, one hundred four".