221797080 has 48 divisors (see below), whose sum is σ = 720841680. Its totient is φ = 59145792.

The previous prime is 221797061. The next prime is 221797087. The reversal of 221797080 is 80797122.

221797080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221797087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307692 + ... + 308411.

It is an arithmetic number, because the mean of its divisors is an integer number (15017535).

Almost surely, 2^221797080 is an apocalyptic number.

221797080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221797080 is an abundant number, since it is smaller than the sum of its proper divisors (499044600).

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

221797080 is a wasteful number, since it uses less digits than its factorization.

221797080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616120 (or 616113 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 221797080 is about 14892.8533196295. The cubic root of 221797080 is about 605.3203503440.

The spelling of 221797080 in words is "two hundred twenty-one million, seven hundred ninety-seven thousand, eighty".