91595251 has 8 divisors (see below), whose sum is σ = 99993600. Its totient is φ = 83208840.

The previous prime is 91595237. The next prime is 91595261. The reversal of 91595251 is 15259519.

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

It is not a de Polignac number, because 91595251 - 2²¹ = 89498099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91595251.

It is not an unprimeable number, because it can be changed into a prime (91595261) 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, 22770 + ... + 26488.

It is an arithmetic number, because the mean of its divisors is an integer number (12499200).

Almost surely, 2^91595251 is an apocalyptic number.

91595251 is a deficient number, since it is larger than the sum of its proper divisors (8398349).

91595251 is a wasteful number, since it uses less digits than its factorization.

91595251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969.

The product of its digits is 20250, while the sum is 37.

The square root of 91595251 is about 9570.5407893180. The cubic root of 91595251 is about 450.7727479840.

The spelling of 91595251 in words is "ninety-one million, five hundred ninety-five thousand, two hundred fifty-one".