220264991 has 2 divisors, whose sum is σ = 220264992. Its totient is φ = 220264990.

The previous prime is 220264987. The next prime is 220265009. The reversal of 220264991 is 199462022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220264991 - 2² = 220264987 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220264921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110132495 + 110132496.

It is an arithmetic number, because the mean of its divisors is an integer number (110132496).

Almost surely, 2^220264991 is an apocalyptic number.

220264991 is a deficient number, since it is larger than the sum of its proper divisors (1).

220264991 is an equidigital number, since it uses as much as digits as its factorization.

220264991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 220264991 is about 14841.3271306848. The cubic root of 220264991 is about 603.9233552951.

The spelling of 220264991 in words is "two hundred twenty million, two hundred sixty-four thousand, nine hundred ninety-one".