157191 has 8 divisors (see below), whose sum is σ = 211584. Its totient is φ = 103800.

The previous prime is 157189. The next prime is 157207. The reversal of 157191 is 191751.

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

It is not a de Polignac number, because 157191 - 2¹ = 157189 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157141) 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, 280 + ... + 626.

It is an arithmetic number, because the mean of its divisors is an integer number (26448).

2¹⁵⁷¹⁹¹ is an apocalyptic number.

157191 is a deficient number, since it is larger than the sum of its proper divisors (54393).

157191 is a wasteful number, since it uses less digits than its factorization.

157191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 315, while the sum is 24.

The square root of 157191 is about 396.4732021209. The cubic root of 157191 is about 53.9687748146.

The spelling of 157191 in words is "one hundred fifty-seven thousand, one hundred ninety-one".