91222151 has 2 divisors, whose sum is σ = 91222152. Its totient is φ = 91222150.

The previous prime is 91222147. The next prime is 91222177. The reversal of 91222151 is 15122219.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91222151 - 2² = 91222147 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45611075 + 45611076.

It is an arithmetic number, because the mean of its divisors is an integer number (45611076).

Almost surely, 2^91222151 is an apocalyptic number.

91222151 is a deficient number, since it is larger than the sum of its proper divisors (1).

91222151 is an equidigital number, since it uses as much as digits as its factorization.

91222151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 23.

The square root of 91222151 is about 9551.0287927532. The cubic root of 91222151 is about 450.1598625437.

The spelling of 91222151 in words is "ninety-one million, two hundred twenty-two thousand, one hundred fifty-one".