91550157 has 8 divisors (see below), whose sum is σ = 122646240. Its totient is φ = 60743760.

The previous prime is 91550153. The next prime is 91550159. The reversal of 91550157 is 75105519.

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

It is not a de Polignac number, because 91550157 - 2² = 91550153 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91550153) 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, 71682 + ... + 72947.

It is an arithmetic number, because the mean of its divisors is an integer number (15330780).

Almost surely, 2^91550157 is an apocalyptic number.

It is an amenable number.

91550157 is a deficient number, since it is larger than the sum of its proper divisors (31096083).

91550157 is a wasteful number, since it uses less digits than its factorization.

91550157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144843.

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 91550157 is about 9568.1846240549. The cubic root of 91550157 is about 450.6987613134.

The spelling of 91550157 in words is "ninety-one million, five hundred fifty thousand, one hundred fifty-seven".