90222209 has 16 divisors (see below), whose sum is σ = 112720896. Its totient is φ = 70155600.

The previous prime is 90222199. The next prime is 90222217.

90222209 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 90222209 - 2¹⁶ = 90156673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90222229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48914 + ... + 50724.

It is an arithmetic number, because the mean of its divisors is an integer number (7045056).

Almost surely, 2^90222209 is an apocalyptic number.

It is an amenable number.

90222209 is a deficient number, since it is larger than the sum of its proper divisors (22498687).

90222209 is a wasteful number, since it uses less digits than its factorization.

90222209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 90222209 is about 9498.5372031698. The cubic root of 90222209 is about 448.5089894864.

The spelling of 90222209 in words is "ninety million, two hundred twenty-two thousand, two hundred nine".