221772304 has 40 divisors (see below), whose sum is σ = 463706432. Its totient is φ = 102142080.

The previous prime is 221772301. The next prime is 221772307. The reversal of 221772304 is 403277122.

It is an interprime number because it is at equal distance from previous prime (221772301) and next prime (221772307).

It is not an unprimeable number, because it can be changed into a prime (221772301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142957 + ... + 144499.

Almost surely, 2^221772304 is an apocalyptic number.

It is an amenable number.

221772304 is an abundant number, since it is smaller than the sum of its proper divisors (241934128).

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

221772304 is a wasteful number, since it uses less digits than its factorization.

221772304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255 (or 2249 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 221772304 is about 14892.0214880318. The cubic root of 221772304 is about 605.2978102584.

The spelling of 221772304 in words is "two hundred twenty-one million, seven hundred seventy-two thousand, three hundred four".