158231136 has 96 divisors (see below), whose sum is σ = 486355968. Its totient is φ = 44098560.

The previous prime is 158231123. The next prime is 158231137. The reversal of 158231136 is 631132851.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158231137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24681 + ... + 30423.

It is an arithmetic number, because the mean of its divisors is an integer number (5066208).

Almost surely, 2^158231136 is an apocalyptic number.

158231136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158231136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243177984).

158231136 is an abundant number, since it is smaller than the sum of its proper divisors (328124832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158231136 is a wasteful number, since it uses less digits than its factorization.

158231136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5804 (or 5796 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 158231136 is about 12578.9958263766. The cubic root of 158231136 is about 540.8755070627.

Adding to 158231136 its reverse (631132851), we get a palindrome (789363987).

The spelling of 158231136 in words is "one hundred fifty-eight million, two hundred thirty-one thousand, one hundred thirty-six".