157951187 has 4 divisors (see below), whose sum is σ = 162220176. Its totient is φ = 153682200.

The previous prime is 157951177. The next prime is 157951219. The reversal of 157951187 is 781159751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157951187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157951127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134439 + ... + 2134512.

It is an arithmetic number, because the mean of its divisors is an integer number (40555044).

Almost surely, 2^157951187 is an apocalyptic number.

157951187 is a deficient number, since it is larger than the sum of its proper divisors (4268989).

157951187 is an equidigital number, since it uses as much as digits as its factorization.

157951187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268988.

The product of its digits is 88200, while the sum is 44.

The square root of 157951187 is about 12567.8632631009. The cubic root of 157951187 is about 540.5563390678.

The spelling of 157951187 in words is "one hundred fifty-seven million, nine hundred fifty-one thousand, one hundred eighty-seven".