221944475 has 12 divisors (see below), whose sum is σ = 275689200. Its totient is φ = 177247200.

The previous prime is 221944451. The next prime is 221944487. The reversal of 221944475 is 574449122.

It is not a de Polignac number, because 221944475 - 2¹² = 221940379 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7565 + ... + 22385.

It is an arithmetic number, because the mean of its divisors is an integer number (22974100).

Almost surely, 2^221944475 is an apocalyptic number.

221944475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221944475 is a deficient number, since it is larger than the sum of its proper divisors (53744725).

221944475 is a wasteful number, since it uses less digits than its factorization.

221944475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15430 (or 15425 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 221944475 is about 14897.8010122300. The cubic root of 221944475 is about 605.4544089715.

The spelling of 221944475 in words is "two hundred twenty-one million, nine hundred forty-four thousand, four hundred seventy-five".