156321132 has 96 divisors (see below), whose sum is σ = 422580480. Its totient is φ = 44478720.

The previous prime is 156321097. The next prime is 156321163. The reversal of 156321132 is 231123651.

156321132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156321132² = 48872592619522848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393558 + ... + 393954.

It is an arithmetic number, because the mean of its divisors is an integer number (4401880).

Almost surely, 2^156321132 is an apocalyptic number.

156321132 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 156321132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211290240).

156321132 is an abundant number, since it is smaller than the sum of its proper divisors (266259348).

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

156321132 is a wasteful number, since it uses less digits than its factorization.

156321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 589 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 156321132 is about 12502.8449562490. The cubic root of 156321132 is about 538.6903930407.

Adding to 156321132 its reverse (231123651), we get a palindrome (387444783).

The spelling of 156321132 in words is "one hundred fifty-six million, three hundred twenty-one thousand, one hundred thirty-two".