91255171 has 8 divisors (see below), whose sum is σ = 105464160. Its totient is φ = 77339328.

The previous prime is 91255163. The next prime is 91255181. The reversal of 91255171 is 17155219.

91255171 = T₁₉₉ + T₂₀₀ + ... + T₈₂₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91255171 - 2³ = 91255163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91255181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72616 + ... + 73861.

It is an arithmetic number, because the mean of its divisors is an integer number (13183020).

Almost surely, 2^91255171 is an apocalyptic number.

91255171 is a deficient number, since it is larger than the sum of its proper divisors (14208989).

91255171 is a wasteful number, since it uses less digits than its factorization.

91255171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146573.

The product of its digits is 3150, while the sum is 31.

The square root of 91255171 is about 9552.7572459474. The cubic root of 91255171 is about 450.2141713030.

The spelling of 91255171 in words is "ninety-one million, two hundred fifty-five thousand, one hundred seventy-one".