158531158 has 4 divisors (see below), whose sum is σ = 237796740. Its totient is φ = 79265578.

The previous prime is 158531123. The next prime is 158531159. The reversal of 158531158 is 851135851.

158531158 is digitally balanced in base 3, 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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158531159) 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 as a sum of consecutive naturals, namely, 39632788 + ... + 39632791.

It is an arithmetic number, because the mean of its divisors is an integer number (59449185).

Almost surely, 2^158531158 is an apocalyptic number.

158531158 is a deficient number, since it is larger than the sum of its proper divisors (79265582).

158531158 is an equidigital number, since it uses as much as digits as its factorization.

158531158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79265581.

The product of its digits is 24000, while the sum is 37.

The square root of 158531158 is about 12590.9156934673. The cubic root of 158531158 is about 541.2171425134.

The spelling of 158531158 in words is "one hundred fifty-eight million, five hundred thirty-one thousand, one hundred fifty-eight".