220204591 has 4 divisors (see below), whose sum is σ = 225325672. Its totient is φ = 215083512.

The previous prime is 220204531. The next prime is 220204619. The reversal of 220204591 is 195402022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220204591 - 2²³ = 211815983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220204531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2560476 + ... + 2560561.

It is an arithmetic number, because the mean of its divisors is an integer number (56331418).

Almost surely, 2^220204591 is an apocalyptic number.

220204591 is a deficient number, since it is larger than the sum of its proper divisors (5121081).

220204591 is an equidigital number, since it uses as much as digits as its factorization.

220204591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121080.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 220204591 is about 14839.2921327131. The cubic root of 220204591 is about 603.8681486019.

The spelling of 220204591 in words is "two hundred twenty million, two hundred four thousand, five hundred ninety-one".