220475891 has 4 divisors (see below), whose sum is σ = 220505784. Its totient is φ = 220446000.

The previous prime is 220475887. The next prime is 220475903. The reversal of 220475891 is 198574022.

220475891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 220475891 - 2² = 220475887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220475831) 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, 4916 + ... + 21566.

It is an arithmetic number, because the mean of its divisors is an integer number (55126446).

Almost surely, 2^220475891 is an apocalyptic number.

220475891 is a deficient number, since it is larger than the sum of its proper divisors (29893).

220475891 is a wasteful number, since it uses less digits than its factorization.

220475891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29892.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 220475891 is about 14848.4305904698. The cubic root of 220475891 is about 604.1160426062.

The spelling of 220475891 in words is "two hundred twenty million, four hundred seventy-five thousand, eight hundred ninety-one".