157881 has 4 divisors (see below), whose sum is σ = 210512. Its totient is φ = 105252.

The previous prime is 157877. The next prime is 157889. The reversal of 157881 is 188751.

157881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 157881 - 2² = 157877 is a prime.

It is a super-2 number, since 2×157881² = 49852820322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157889) 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, 26311 + ... + 26316.

It is an arithmetic number, because the mean of its divisors is an integer number (52628).

2¹⁵⁷⁸⁸¹ is an apocalyptic number.

It is an amenable number.

157881 is a deficient number, since it is larger than the sum of its proper divisors (52631).

157881 is an equidigital number, since it uses as much as digits as its factorization.

157881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52630.

The product of its digits is 2240, while the sum is 30.

The square root of 157881 is about 397.3424215963. The cubic root of 157881 is about 54.0476260217.

The spelling of 157881 in words is "one hundred fifty-seven thousand, eight hundred eighty-one".