91117150 has 24 divisors (see below), whose sum is σ = 171165384. Its totient is φ = 36084000.

The previous prime is 91117109. The next prime is 91117157. The reversal of 91117150 is 5171119.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91117157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3972 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (7131891).

Almost surely, 2^91117150 is an apocalyptic number.

91117150 is a deficient number, since it is larger than the sum of its proper divisors (80048234).

91117150 is a wasteful number, since it uses less digits than its factorization.

91117150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18156 (or 18151 counting only the distinct ones).

The product of its (nonzero) digits is 315, while the sum is 25.

The square root of 91117150 is about 9545.5303676642. The cubic root of 91117150 is about 449.9870778182.

Adding to 91117150 its reverse (5171119), we get a palindrome (96288269).

It can be divided in two parts, 9111 and 7150, that added together give a palindrome (16261).

The spelling of 91117150 in words is "ninety-one million, one hundred seventeen thousand, one hundred fifty".