158531171 has 16 divisors (see below), whose sum is σ = 171849600. Its totient is φ = 145692288.

The previous prime is 158531167. The next prime is 158531183. The reversal of 158531171 is 171135851.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 158531171 - 2² = 158531167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158531101) 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 15 ways as a sum of consecutive naturals, for example, 179096 + ... + 179978.

It is an arithmetic number, because the mean of its divisors is an integer number (10740600).

Almost surely, 2^158531171 is an apocalyptic number.

158531171 is a deficient number, since it is larger than the sum of its proper divisors (13318429).

158531171 is a wasteful number, since it uses less digits than its factorization.

158531171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138.

The product of its digits is 4200, while the sum is 32.

The square root of 158531171 is about 12590.9162097125. The cubic root of 158531171 is about 541.2171573072.

The spelling of 158531171 in words is "one hundred fifty-eight million, five hundred thirty-one thousand, one hundred seventy-one".