157851191 has 2 divisors, whose sum is σ = 157851192. Its totient is φ = 157851190.

The previous prime is 157851179. The next prime is 157851217. The reversal of 157851191 is 191158751.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157851191 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157851131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78925595 + 78925596.

It is an arithmetic number, because the mean of its divisors is an integer number (78925596).

Almost surely, 2^157851191 is an apocalyptic number.

157851191 is a deficient number, since it is larger than the sum of its proper divisors (1).

157851191 is an equidigital number, since it uses as much as digits as its factorization.

157851191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 38.

The square root of 157851191 is about 12563.8843913815. The cubic root of 157851191 is about 540.4422428851.

The spelling of 157851191 in words is "one hundred fifty-seven million, eight hundred fifty-one thousand, one hundred ninety-one".