91297255 has 16 divisors (see below), whose sum is σ = 125686080. Its totient is φ = 62364672.

The previous prime is 91297253. The next prime is 91297277. The reversal of 91297255 is 55279219.

It is a cyclic number.

It is not a de Polignac number, because 91297255 - 2¹ = 91297253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91297253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4567 + ... + 14263.

It is an arithmetic number, because the mean of its divisors is an integer number (7855380).

Almost surely, 2^91297255 is an apocalyptic number.

91297255 is a deficient number, since it is larger than the sum of its proper divisors (34388825).

91297255 is a wasteful number, since it uses less digits than its factorization.

91297255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978.

The product of its digits is 56700, while the sum is 40.

The square root of 91297255 is about 9554.9597068747. The cubic root of 91297255 is about 450.2833688479.

It can be divided in two parts, 9129 and 7255, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 91297255 in words is "ninety-one million, two hundred ninety-seven thousand, two hundred fifty-five".