220885691 has 4 divisors (see below), whose sum is σ = 237876912. Its totient is φ = 203894472.

The previous prime is 220885681. The next prime is 220885699. The reversal of 220885691 is 196588022.

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 220885691 - 2⁶ = 220885627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220885699) 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, 8495591 + ... + 8495616.

It is an arithmetic number, because the mean of its divisors is an integer number (59469228).

Almost surely, 2^220885691 is an apocalyptic number.

220885691 is a deficient number, since it is larger than the sum of its proper divisors (16991221).

220885691 is a wasteful number, since it uses less digits than its factorization.

220885691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16991220.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 220885691 is about 14862.2236223252. The cubic root of 220885691 is about 604.4901024436.

The spelling of 220885691 in words is "two hundred twenty million, eight hundred eighty-five thousand, six hundred ninety-one".