221354112 has 64 divisors (see below), whose sum is σ = 671976000. Its totient is φ = 63243264.

The previous prime is 221354053. The next prime is 221354113. The reversal of 221354112 is 211453122.

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 (21).

It is not an unprimeable number, because it can be changed into a prime (221354113) 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, 38487 + ... + 43862.

It is an arithmetic number, because the mean of its divisors is an integer number (10499625).

Almost surely, 2^221354112 is an apocalyptic number.

It is an amenable number.

221354112 is an abundant number, since it is smaller than the sum of its proper divisors (450621888).

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

221354112 is an equidigital number, since it uses as much as digits as its factorization.

221354112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82373 (or 82361 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 221354112 is about 14877.9740556300. The cubic root of 221354112 is about 604.9171045042.

The spelling of 221354112 in words is "two hundred twenty-one million, three hundred fifty-four thousand, one hundred twelve".