158396171 has 4 divisors (see below), whose sum is σ = 161384832. Its totient is φ = 155407512.

The previous prime is 158396159. The next prime is 158396197. The reversal of 158396171 is 171693851.

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 158396171 - 2¹⁰ = 158395147 is a prime.

It is a super-2 number, since 2×158396171² = 50178693974922482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158396111) 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, 1494251 + ... + 1494356.

It is an arithmetic number, because the mean of its divisors is an integer number (40346208).

Almost surely, 2^158396171 is an apocalyptic number.

158396171 is a deficient number, since it is larger than the sum of its proper divisors (2988661).

158396171 is an equidigital number, since it uses as much as digits as its factorization.

158396171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988660.

The product of its digits is 45360, while the sum is 41.

The square root of 158396171 is about 12585.5540601119. The cubic root of 158396171 is about 541.0634860232.

The spelling of 158396171 in words is "one hundred fifty-eight million, three hundred ninety-six thousand, one hundred seventy-one".