221877152 has 24 divisors (see below), whose sum is σ = 499224096. Its totient is φ = 95090112.

The previous prime is 221877151. The next prime is 221877163. The reversal of 221877152 is 251778122.

It is a super-2 number, since 2×221877152² = 98458941159262208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221877151) by changing a digit.

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, 495038 + ... + 495485.

It is an arithmetic number, because the mean of its divisors is an integer number (20801004).

Almost surely, 2^221877152 is an apocalyptic number.

It is an amenable number.

221877152 is an abundant number, since it is smaller than the sum of its proper divisors (277346944).

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

221877152 is an equidigital number, since it uses as much as digits as its factorization.

221877152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990540 (or 990532 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 221877152 is about 14895.5413463224. The cubic root of 221877152 is about 605.3931847557.

The spelling of 221877152 in words is "two hundred twenty-one million, eight hundred seventy-seven thousand, one hundred fifty-two".