91151145 has 24 divisors (see below), whose sum is σ = 158348736. Its totient is φ = 48505248.

The previous prime is 91151119. The next prime is 91151153. The reversal of 91151145 is 54115119.

It is not a de Polignac number, because 91151145 - 2²² = 86956841 is a prime.

It is a super-2 number, since 2×91151145² = 16617062469622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20622 + ... + 24648.

It is an arithmetic number, because the mean of its divisors is an integer number (6597864).

Almost surely, 2^91151145 is an apocalyptic number.

It is an amenable number.

91151145 is a deficient number, since it is larger than the sum of its proper divisors (67197591).

91151145 is a wasteful number, since it uses less digits than its factorization.

91151145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541 (or 4538 counting only the distinct ones).

The product of its digits is 900, while the sum is 27.

The square root of 91151145 is about 9547.3108779384. The cubic root of 91151145 is about 450.0430329217.

It can be divided in two parts, 9115114 and 5, that added together give a palindrome (9115119).

The spelling of 91151145 in words is "ninety-one million, one hundred fifty-one thousand, one hundred forty-five".