158231232 has 140 divisors (see below), whose sum is σ = 474655896. Its totient is φ = 52116480.

The previous prime is 158231219. The next prime is 158231261. The reversal of 158231232 is 232132851.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 158231196 and 158231205.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 678988 + ... + 679220.

Almost surely, 2^158231232 is an apocalyptic number.

158231232 is a gapful number since it is divisible by the number (12) 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 158231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237327948).

158231232 is an abundant number, since it is smaller than the sum of its proper divisors (316424664).

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

158231232 is a wasteful number, since it uses less digits than its factorization.

158231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 369 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 158231232 is about 12578.9996422609. Note that the first 3 decimals coincide. The cubic root of 158231232 is about 540.8756164471.

It can be divided in two parts, 15823123 and 2, that added together give a triangular number (15823125 = T₅₆₂₅).

The spelling of 158231232 in words is "one hundred fifty-eight million, two hundred thirty-one thousand, two hundred thirty-two".