157291171 has 2 divisors, whose sum is σ = 157291172. Its totient is φ = 157291170.

The previous prime is 157291163. The next prime is 157291217. The reversal of 157291171 is 171192751.

It is a weak prime.

It is an emirp because it is prime and its reverse (171192751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157291171 - 2³ = 157291163 is a prime.

It is not a weakly prime, because it can be changed into another prime (157291111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78645585 + 78645586.

It is an arithmetic number, because the mean of its divisors is an integer number (78645586).

Almost surely, 2^157291171 is an apocalyptic number.

157291171 is a deficient number, since it is larger than the sum of its proper divisors (1).

157291171 is an equidigital number, since it uses as much as digits as its factorization.

157291171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4410, while the sum is 34.

The square root of 157291171 is about 12541.5776918217. The cubic root of 157291171 is about 539.8023636606.

It can be divided in two parts, 15729 and 1171, that added together give a square (16900 = 130²).

The spelling of 157291171 in words is "one hundred fifty-seven million, two hundred ninety-one thousand, one hundred seventy-one".