158231109 has 8 divisors (see below), whose sum is σ = 212269792. Its totient is φ = 104839920.

The previous prime is 158231089. The next prime is 158231111. The reversal of 158231109 is 901132851.

158231109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 158231109 - 2¹⁶ = 158165573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158231149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161302 + ... + 162279.

It is an arithmetic number, because the mean of its divisors is an integer number (26533724).

Almost surely, 2^158231109 is an apocalyptic number.

It is an amenable number.

158231109 is a deficient number, since it is larger than the sum of its proper divisors (54038683).

158231109 is a wasteful number, since it uses less digits than its factorization.

158231109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323747.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 158231109 is about 12578.9947531589. The cubic root of 158231109 is about 540.8754762984.

The spelling of 158231109 in words is "one hundred fifty-eight million, two hundred thirty-one thousand, one hundred nine".