16327231 has 4 divisors (see below), whose sum is σ = 16557264. Its totient is φ = 16097200.

The previous prime is 16327187. The next prime is 16327243. The reversal of 16327231 is 13272361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16327231 - 2²¹ = 14230079 is a prime.

It is a super-2 number, since 2×16327231² = 533156944254722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16327196 and 16327205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16322231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114910 + ... + 115051.

It is an arithmetic number, because the mean of its divisors is an integer number (4139316).

Almost surely, 2^16327231 is an apocalyptic number.

16327231 is a deficient number, since it is larger than the sum of its proper divisors (230033).

16327231 is an equidigital number, since it uses as much as digits as its factorization.

16327231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230032.

The product of its digits is 1512, while the sum is 25.

The square root of 16327231 is about 4040.6968458423. The cubic root of 16327231 is about 253.6904852052.

Adding to 16327231 its reverse (13272361), we get a palindrome (29599592).

The spelling of 16327231 in words is "sixteen million, three hundred twenty-seven thousand, two hundred thirty-one".