221774431360 has 64 divisors (see below), whose sum is σ = 530307694080. Its totient is φ = 88688323584.

The previous prime is 221774431337. The next prime is 221774431397. The reversal of 221774431360 is 63134477122.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2752609 + ... + 2832031.

It is an arithmetic number, because the mean of its divisors is an integer number (8286057720).

Almost surely, 2^221774431360 is an apocalyptic number.

221774431360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221774431360 is an abundant number, since it is smaller than the sum of its proper divisors (308533262720).

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

221774431360 is an equidigital number, since it uses as much as digits as its factorization.

221774431360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83805 (or 83793 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 221774431360 in words is "two hundred twenty-one billion, seven hundred seventy-four million, four hundred thirty-one thousand, three hundred sixty".