221196928 has 32 divisors (see below), whose sum is σ = 466591860. Its totient is φ = 104091648.

The previous prime is 221196901. The next prime is 221196947. The reversal of 221196928 is 829691122.

It can be written as a sum of positive squares in 2 ways, for example, as 176145984 + 45050944 = 13272^2 + 6712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48651 + ... + 53002.

Almost surely, 2^221196928 is an apocalyptic number.

It is an amenable number.

221196928 is an abundant number, since it is smaller than the sum of its proper divisors (245394932).

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

221196928 is a wasteful number, since it uses less digits than its factorization.

221196928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101684 (or 101672 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 221196928 is about 14872.6906778834. The cubic root of 221196928 is about 604.7738863150.

The spelling of 221196928 in words is "two hundred twenty-one million, one hundred ninety-six thousand, nine hundred twenty-eight".