221474564 has 12 divisors (see below), whose sum is σ = 407979600. Its totient is φ = 104908968.

The previous prime is 221474557. The next prime is 221474647. The reversal of 221474564 is 465474122.

It is a happy number.

221474564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1456994 + ... + 1457145.

It is an arithmetic number, because the mean of its divisors is an integer number (33998300).

Almost surely, 2^221474564 is an apocalyptic number.

It is an amenable number.

221474564 is a deficient number, since it is larger than the sum of its proper divisors (186505036).

221474564 is a wasteful number, since it uses less digits than its factorization.

221474564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914162 (or 2914160 counting only the distinct ones).

The product of its digits is 53760, while the sum is 35.

The square root of 221474564 is about 14882.0215024707. The cubic root of 221474564 is about 605.0268084562.

The spelling of 221474564 in words is "two hundred twenty-one million, four hundred seventy-four thousand, five hundred sixty-four".