91222141 has 4 divisors (see below), whose sum is σ = 91362492. Its totient is φ = 91081792.

The previous prime is 91222111. The next prime is 91222147. The reversal of 91222141 is 14122219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42850116 + 48372025 = 6546^2 + 6955^2 .

It is a cyclic number.

It is not a de Polignac number, because 91222141 - 2⁷ = 91222013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91222147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69196 + ... + 70501.

It is an arithmetic number, because the mean of its divisors is an integer number (22840623).

Almost surely, 2^91222141 is an apocalyptic number.

It is an amenable number.

91222141 is a deficient number, since it is larger than the sum of its proper divisors (140351).

91222141 is a wasteful number, since it uses less digits than its factorization.

91222141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140350.

The product of its digits is 288, while the sum is 22.

The square root of 91222141 is about 9551.0282692493. The cubic root of 91222141 is about 450.1598460944.

The spelling of 91222141 in words is "ninety-one million, two hundred twenty-two thousand, one hundred forty-one".