221112456 has 16 divisors (see below), whose sum is σ = 552781200. Its totient is φ = 73704144.

The previous prime is 221112433. The next prime is 221112457. The reversal of 221112456 is 654211122.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 9213019 = 221112456 / (2 + 2 + 1 + 1 + 1 + 2 + 4 + 5 + 6).

It is not an unprimeable number, because it can be changed into a prime (221112457) 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, 4606486 + ... + 4606533.

It is an arithmetic number, because the mean of its divisors is an integer number (34548825).

Almost surely, 2^221112456 is an apocalyptic number.

It is an amenable number.

221112456 is an abundant number, since it is smaller than the sum of its proper divisors (331668744).

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

221112456 is a wasteful number, since it uses less digits than its factorization.

221112456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213028 (or 9213024 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 221112456 is about 14869.8505708699. The cubic root of 221112456 is about 604.6968916288.

Adding to 221112456 its reverse (654211122), we get a palindrome (875323578).

The spelling of 221112456 in words is "two hundred twenty-one million, one hundred twelve thousand, four hundred fifty-six".