157865871 has 4 divisors (see below), whose sum is σ = 210487832. Its totient is φ = 105243912.

The previous prime is 157865863. The next prime is 157865881. The reversal of 157865871 is 178568751.

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

It is not a de Polignac number, because 157865871 - 2³ = 157865863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157865871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157865861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26310976 + ... + 26310981.

It is an arithmetic number, because the mean of its divisors is an integer number (52621958).

Almost surely, 2^157865871 is an apocalyptic number.

157865871 is a deficient number, since it is larger than the sum of its proper divisors (52621961).

157865871 is an equidigital number, since it uses as much as digits as its factorization.

157865871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52621960.

The product of its digits is 470400, while the sum is 48.

The square root of 157865871 is about 12564.4685920257. The cubic root of 157865871 is about 540.4589958918.

The spelling of 157865871 in words is "one hundred fifty-seven million, eight hundred sixty-five thousand, eight hundred seventy-one".