16641231 has 8 divisors (see below), whose sum is σ = 22788144. Its totient is φ = 10794240.

The previous prime is 16641221. The next prime is 16641239. The reversal of 16641231 is 13214661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16641231 - 2¹⁰ = 16640207 is a prime.

It is a super-2 number, since 2×16641231² = 553861138390722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74850 + ... + 75071.

It is an arithmetic number, because the mean of its divisors is an integer number (2848518).

Almost surely, 2^16641231 is an apocalyptic number.

16641231 is a deficient number, since it is larger than the sum of its proper divisors (6146913).

16641231 is a wasteful number, since it uses less digits than its factorization.

16641231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149961.

The product of its digits is 864, while the sum is 24.

The square root of 16641231 is about 4079.3664949352. The cubic root of 16641231 is about 255.3064673623.

Adding to 16641231 its reverse (13214661), we get a palindrome (29855892).

The spelling of 16641231 in words is "sixteen million, six hundred forty-one thousand, two hundred thirty-one".