158422189 has 4 divisors (see below), whose sum is σ = 158766300. Its totient is φ = 158078080.

The previous prime is 158422177. The next prime is 158422207. The reversal of 158422189 is 981224851.

158422189 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 an emirpimes, since its reverse is a distinct semiprime: 981224851 = 577 ⋅1700563.

It can be written as a sum of positive squares in 2 ways, for example, as 87272964 + 71149225 = 9342^2 + 8435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158422189 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158422129) 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, 171364 + ... + 172285.

It is an arithmetic number, because the mean of its divisors is an integer number (39691575).

Almost surely, 2^158422189 is an apocalyptic number.

It is an amenable number.

158422189 is a deficient number, since it is larger than the sum of its proper divisors (344111).

158422189 is an equidigital number, since it uses as much as digits as its factorization.

158422189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344110.

The product of its digits is 46080, while the sum is 40.

The square root of 158422189 is about 12586.5876630642. The cubic root of 158422189 is about 541.0931092542.

The spelling of 158422189 in words is "one hundred fifty-eight million, four hundred twenty-two thousand, one hundred eighty-nine".