221345484 has 24 divisors (see below), whose sum is σ = 517601280. Its totient is φ = 73620624.

The previous prime is 221345477. The next prime is 221345489. The reversal of 221345484 is 484543122.

It is not an unprimeable number, because it can be changed into a prime (221345489) 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, 14364 + ... + 25475.

It is an arithmetic number, because the mean of its divisors is an integer number (21566720).

Almost surely, 2^221345484 is an apocalyptic number.

It is an amenable number.

221345484 is an abundant number, since it is smaller than the sum of its proper divisors (296255796).

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

221345484 is a wasteful number, since it uses less digits than its factorization.

221345484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40309 (or 40307 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

The square root of 221345484 is about 14877.6840939711. The cubic root of 221345484 is about 604.9092448617.

The spelling of 221345484 in words is "two hundred twenty-one million, three hundred forty-five thousand, four hundred eighty-four".