91151118 has 48 divisors (see below), whose sum is σ = 209336400. Its totient is φ = 28613760.

The previous prime is 91151117. The next prime is 91151119. The reversal of 91151118 is 81115119.

It is an interprime number because it is at equal distance from previous prime (91151117) and next prime (91151119).

It is a junction number, because it is equal to n+sod(n) for n = 91151091 and 91151100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91151117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19273 + ... + 23531.

It is an arithmetic number, because the mean of its divisors is an integer number (4361175).

Almost surely, 2^91151118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91151118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104668200).

91151118 is an abundant number, since it is smaller than the sum of its proper divisors (118185282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91151118 is a wasteful number, since it uses less digits than its factorization.

91151118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337 (or 4334 counting only the distinct ones).

The product of its digits is 360, while the sum is 27.

The square root of 91151118 is about 9547.3094639275. The cubic root of 91151118 is about 450.0429884858.

It can be divided in two parts, 9115111 and 8, that added together give a palindrome (9115119).

The spelling of 91151118 in words is "ninety-one million, one hundred fifty-one thousand, one hundred eighteen".