157231871 has 2 divisors, whose sum is σ = 157231872. Its totient is φ = 157231870.

The previous prime is 157231847. The next prime is 157231891. The reversal of 157231871 is 178132751.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (178132751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157231871 - 2¹⁸ = 156969727 is a prime.

It is a super-2 number, since 2×157231871² = 49443722516321282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157231891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78615935 + 78615936.

It is an arithmetic number, because the mean of its divisors is an integer number (78615936).

Almost surely, 2^157231871 is an apocalyptic number.

157231871 is a deficient number, since it is larger than the sum of its proper divisors (1).

157231871 is an equidigital number, since it uses as much as digits as its factorization.

157231871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 35.

The square root of 157231871 is about 12539.2133325819. The cubic root of 157231871 is about 539.7345185648.

The spelling of 157231871 in words is "one hundred fifty-seven million, two hundred thirty-one thousand, eight hundred seventy-one".