158208891 has 16 divisors (see below), whose sum is σ = 219682560. Its totient is φ = 101152800.

The previous prime is 158208863. The next prime is 158208937. The reversal of 158208891 is 198802851.

It is not a de Polignac number, because 158208891 - 2¹⁰ = 158207867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158208821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7116 + ... + 19158.

It is an arithmetic number, because the mean of its divisors is an integer number (13730160).

Almost surely, 2^158208891 is an apocalyptic number.

158208891 is a deficient number, since it is larger than the sum of its proper divisors (61473669).

158208891 is a wasteful number, since it uses less digits than its factorization.

158208891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12226.

The product of its (nonzero) digits is 46080, while the sum is 42.

The square root of 158208891 is about 12578.1115832227. Note that the first 3 decimals coincide. The cubic root of 158208891 is about 540.8501594608.

The spelling of 158208891 in words is "one hundred fifty-eight million, two hundred eight thousand, eight hundred ninety-one".