220813091 has 2 divisors, whose sum is σ = 220813092. Its totient is φ = 220813090.

The previous prime is 220813069. The next prime is 220813129. The reversal of 220813091 is 190318022.

220813091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220813091 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220813091.

It is not a weakly prime, because it can be changed into another prime (220813001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110406545 + 110406546.

It is an arithmetic number, because the mean of its divisors is an integer number (110406546).

Almost surely, 2^220813091 is an apocalyptic number.

220813091 is a deficient number, since it is larger than the sum of its proper divisors (1).

220813091 is an equidigital number, since it uses as much as digits as its factorization.

220813091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 220813091 is about 14859.7809876189. The cubic root of 220813091 is about 604.4238678975.

The spelling of 220813091 in words is "two hundred twenty million, eight hundred thirteen thousand, ninety-one".