91281255 has 16 divisors (see below), whose sum is σ = 157284960. Its totient is φ = 44938368.

The previous prime is 91281247. The next prime is 91281271. The reversal of 91281255 is 55218219.

It is not a de Polignac number, because 91281255 - 2³ = 91281247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233860 + ... + 234249.

It is an arithmetic number, because the mean of its divisors is an integer number (9830310).

Almost surely, 2^91281255 is an apocalyptic number.

91281255 is a deficient number, since it is larger than the sum of its proper divisors (66003705).

91281255 is a wasteful number, since it uses less digits than its factorization.

91281255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468130.

The product of its digits is 7200, while the sum is 33.

The square root of 91281255 is about 9554.1224086778. The cubic root of 91281255 is about 450.2570630011.

The spelling of 91281255 in words is "ninety-one million, two hundred eighty-one thousand, two hundred fifty-five".