91281351 has 8 divisors (see below), whose sum is σ = 139095424. Its totient is φ = 52160760.

The previous prime is 91281349. The next prime is 91281353. The reversal of 91281351 is 15318219.

It is an interprime number because it is at equal distance from previous prime (91281349) and next prime (91281353).

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

It is not a de Polignac number, because 91281351 - 2¹ = 91281349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91281353) 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, 2173345 + ... + 2173386.

It is an arithmetic number, because the mean of its divisors is an integer number (17386928).

Almost surely, 2^91281351 is an apocalyptic number.

91281351 is a deficient number, since it is larger than the sum of its proper divisors (47814073).

91281351 is a wasteful number, since it uses less digits than its factorization.

91281351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346741.

The product of its digits is 2160, while the sum is 30.

The square root of 91281351 is about 9554.1274326858. The cubic root of 91281351 is about 450.2572208453.

The spelling of 91281351 in words is "ninety-one million, two hundred eighty-one thousand, three hundred fifty-one".