158391271 has 4 divisors (see below), whose sum is σ = 165277872. Its totient is φ = 151504672.

The previous prime is 158391257. The next prime is 158391281. The reversal of 158391271 is 172193851.

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

It is a cyclic number.

It is not a de Polignac number, because 158391271 - 2¹⁷ = 158260199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158391271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158391251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443266 + ... + 3443311.

It is an arithmetic number, because the mean of its divisors is an integer number (41319468).

Almost surely, 2^158391271 is an apocalyptic number.

158391271 is a deficient number, since it is larger than the sum of its proper divisors (6886601).

158391271 is an equidigital number, since it uses as much as digits as its factorization.

158391271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886600.

The product of its digits is 15120, while the sum is 37.

The square root of 158391271 is about 12585.3593909749. The cubic root of 158391271 is about 541.0579066829.

The spelling of 158391271 in words is "one hundred fifty-eight million, three hundred ninety-one thousand, two hundred seventy-one".