220900891 has 2 divisors, whose sum is σ = 220900892. Its totient is φ = 220900890.

The previous prime is 220900871. The next prime is 220900903. The reversal of 220900891 is 198009022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220900891 - 2¹³ = 220892699 is a prime.

It is not a weakly prime, because it can be changed into another prime (220900831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110450445 + 110450446.

It is an arithmetic number, because the mean of its divisors is an integer number (110450446).

Almost surely, 2^220900891 is an apocalyptic number.

220900891 is a deficient number, since it is larger than the sum of its proper divisors (1).

220900891 is an equidigital number, since it uses as much as digits as its factorization.

220900891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 220900891 is about 14862.7349771164. The cubic root of 220900891 is about 604.5039678940.

The spelling of 220900891 in words is "two hundred twenty million, nine hundred thousand, eight hundred ninety-one".