158237881 has 4 divisors (see below), whose sum is σ = 158329600. Its totient is φ = 158146164.

The previous prime is 158237879. The next prime is 158237897. The reversal of 158237881 is 188732851.

158237881 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 a cyclic number.

It is not a de Polignac number, because 158237881 - 2¹ = 158237879 is a prime.

It is a super-2 number, since 2×158237881² = 50078453966740322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158237831) 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, 43221 + ... + 46738.

It is an arithmetic number, because the mean of its divisors is an integer number (39582400).

Almost surely, 2^158237881 is an apocalyptic number.

It is an amenable number.

158237881 is a deficient number, since it is larger than the sum of its proper divisors (91719).

158237881 is an equidigital number, since it uses as much as digits as its factorization.

158237881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91718.

The product of its digits is 107520, while the sum is 43.

The square root of 158237881 is about 12579.2639291812. The cubic root of 158237881 is about 540.8831923463.

The spelling of 158237881 in words is "one hundred fifty-eight million, two hundred thirty-seven thousand, eight hundred eighty-one".