221132418 has 32 divisors (see below), whose sum is σ = 482037696. Its totient is φ = 67219008.

The previous prime is 221132399. The next prime is 221132423. The reversal of 221132418 is 814231122.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10605 + ... + 23552.

It is an arithmetic number, because the mean of its divisors is an integer number (15063678).

Almost surely, 2^221132418 is an apocalyptic number.

221132418 is an abundant number, since it is smaller than the sum of its proper divisors (260905278).

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

221132418 is a wasteful number, since it uses less digits than its factorization.

221132418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34258.

The product of its digits is 768, while the sum is 24.

The square root of 221132418 is about 14870.5217796821. The cubic root of 221132418 is about 604.7150883967.

It can be divided in two parts, 22113 and 2418, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 221132418 in words is "two hundred twenty-one million, one hundred thirty-two thousand, four hundred eighteen".