158194227 has 4 divisors (see below), whose sum is σ = 210925640. Its totient is φ = 105462816.

The previous prime is 158194219. The next prime is 158194229. The reversal of 158194227 is 722491851.

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

It is not a de Polignac number, because 158194227 - 2³ = 158194219 is a prime.

It is a super-2 number, since 2×158194227² = 50050826912255058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158194229) 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, 26365702 + ... + 26365707.

It is an arithmetic number, because the mean of its divisors is an integer number (52731410).

Almost surely, 2^158194227 is an apocalyptic number.

158194227 is a deficient number, since it is larger than the sum of its proper divisors (52731413).

158194227 is an equidigital number, since it uses as much as digits as its factorization.

158194227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52731412.

The product of its digits is 40320, while the sum is 39.

The square root of 158194227 is about 12577.5286523228. The cubic root of 158194227 is about 540.8334489129.

The spelling of 158194227 in words is "one hundred fifty-eight million, one hundred ninety-four thousand, two hundred twenty-seven".