221155032 has 96 divisors (see below), whose sum is σ = 650689200. Its totient is φ = 62447616.

The previous prime is 221155027. The next prime is 221155043. The reversal of 221155032 is 230551122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103608 + ... + 105720.

Almost surely, 2^221155032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221155032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325344600).

221155032 is an abundant number, since it is smaller than the sum of its proper divisors (429534168).

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

221155032 is a wasteful number, since it uses less digits than its factorization.

221155032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 221155032 is about 14871.2821236099. The cubic root of 221155032 is about 604.7357013263.

The spelling of 221155032 in words is "two hundred twenty-one million, one hundred fifty-five thousand, thirty-two".