220988845 has 32 divisors (see below), whose sum is σ = 342040320. Its totient is φ = 133002240.

The previous prime is 220988843. The next prime is 220988851. The reversal of 220988845 is 548889022.

It is not a de Polignac number, because 220988845 - 2¹ = 220988843 is a prime.

It is a super-2 number, since 2×220988845² = 97672139228868050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220988795 and 220988804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220988843) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1269 + ... + 21061.

It is an arithmetic number, because the mean of its divisors is an integer number (10688760).

Almost surely, 2^220988845 is an apocalyptic number.

It is an amenable number.

220988845 is a deficient number, since it is larger than the sum of its proper divisors (121051475).

220988845 is a wasteful number, since it uses less digits than its factorization.

220988845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19845.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 220988845 is about 14865.6935593332. The cubic root of 220988845 is about 604.5841871072.

The spelling of 220988845 in words is "two hundred twenty million, nine hundred eighty-eight thousand, eight hundred forty-five".