221347360 has 48 divisors (see below), whose sum is σ = 563164056. Its totient is φ = 81727488.

The previous prime is 221347349. The next prime is 221347363. The reversal of 221347360 is 63743122.

It can be written as a sum of positive squares in 4 ways, for example, as 167236624 + 54110736 = 12932^2 + 7356^2 .

It is not an unprimeable number, because it can be changed into a prime (221347363) 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 7 ways as a sum of consecutive naturals, for example, 51129 + ... + 55288.

Almost surely, 2^221347360 is an apocalyptic number.

221347360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221347360 is an abundant number, since it is smaller than the sum of its proper divisors (341816696).

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

221347360 is a wasteful number, since it uses less digits than its factorization.

221347360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106445 (or 106437 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 221347360 is about 14877.7471412845. The cubic root of 221347360 is about 604.9109538139.

The spelling of 221347360 in words is "two hundred twenty-one million, three hundred forty-seven thousand, three hundred sixty".