91222245 has 12 divisors (see below), whose sum is σ = 158118636. Its totient is φ = 48651840.

The previous prime is 91222223. The next prime is 91222277. The reversal of 91222245 is 54222219.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12047841 + 79174404 = 3471^2 + 8898^2 .

It is not a de Polignac number, because 91222245 - 2⁵ = 91222213 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1013536 + ... + 1013625.

It is an arithmetic number, because the mean of its divisors is an integer number (13176553).

Almost surely, 2^91222245 is an apocalyptic number.

It is an amenable number.

91222245 is a deficient number, since it is larger than the sum of its proper divisors (66896391).

91222245 is a wasteful number, since it uses less digits than its factorization.

91222245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027172 (or 2027169 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 91222245 is about 9551.0337136877. The cubic root of 91222245 is about 450.1600171662.

The spelling of 91222245 in words is "ninety-one million, two hundred twenty-two thousand, two hundred forty-five".