16431132 has 24 divisors (see below), whose sum is σ = 38866576. Its totient is φ = 5401728.

The previous prime is 16431127. The next prime is 16431161. The reversal of 16431132 is 23113461.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 16431099 and 16431108.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8503 + ... + 10254.

Almost surely, 2^16431132 is an apocalyptic number.

16431132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16431132 is an abundant number, since it is smaller than the sum of its proper divisors (22435444).

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

16431132 is a wasteful number, since it uses less digits than its factorization.

16431132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18837 (or 18835 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 16431132 is about 4053.5332735775. The cubic root of 16431132 is about 254.2274813299.

Adding to 16431132 its reverse (23113461), we get a palindrome (39544593).

It can be divided in two parts, 1643 and 1132, that added together give a triangular number (2775 = T₇₄).

The spelling of 16431132 in words is "sixteen million, four hundred thirty-one thousand, one hundred thirty-two".