90220211 has 2 divisors, whose sum is σ = 90220212. Its totient is φ = 90220210.

The previous prime is 90220201. The next prime is 90220219. The reversal of 90220211 is 11202209.

It is a strong prime.

It is an emirp because it is prime and its reverse (11202209) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90220211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90220211.

It is not a weakly prime, because it can be changed into another prime (90220219) 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 as a sum of consecutive naturals, namely, 45110105 + 45110106.

It is an arithmetic number, because the mean of its divisors is an integer number (45110106).

Almost surely, 2^90220211 is an apocalyptic number.

90220211 is a deficient number, since it is larger than the sum of its proper divisors (1).

90220211 is an equidigital number, since it uses as much as digits as its factorization.

90220211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 90220211 is about 9498.4320284982. The cubic root of 90220211 is about 448.5056786698.

The spelling of 90220211 in words is "ninety million, two hundred twenty thousand, two hundred eleven".