221428080 has 100 divisors (see below), whose sum is σ = 769075032. Its totient is φ = 59045760.

The previous prime is 221428013. The next prime is 221428127. The reversal of 221428080 is 80824122.

221428080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221428080² = 98060789224972800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10606 + ... + 23565.

Almost surely, 2^221428080 is an apocalyptic number.

221428080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221428080 is an abundant number, since it is smaller than the sum of its proper divisors (547646952).

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

221428080 is a wasteful number, since it uses less digits than its factorization.

221428080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34196 (or 34181 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 221428080 is about 14880.4596703193. The cubic root of 221428080 is about 604.9844769826.

The spelling of 221428080 in words is "two hundred twenty-one million, four hundred twenty-eight thousand, eighty".