220396221 has 20 divisors (see below), whose sum is σ = 330343552. Its totient is φ = 146435688.

The previous prime is 220396213. The next prime is 220396223. The reversal of 220396221 is 122693022.

220396221 is a `hidden beast` number, since 2 + 2 + 0 + 39 + 622 + 1 = 666.

It is not a de Polignac number, because 220396221 - 2³ = 220396213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220396223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20436 + ... + 29298.

Almost surely, 2^220396221 is an apocalyptic number.

It is an amenable number.

220396221 is a deficient number, since it is larger than the sum of its proper divisors (109947331).

220396221 is an equidigital number, since it uses as much as digits as its factorization.

220396221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182 (or 9173 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 220396221 is about 14845.7475729584. The cubic root of 220396221 is about 604.0432671153.

The spelling of 220396221 in words is "two hundred twenty million, three hundred ninety-six thousand, two hundred twenty-one".