16144431 has 4 divisors (see below), whose sum is σ = 21525912. Its totient is φ = 10762952.

The previous prime is 16144417. The next prime is 16144451. The reversal of 16144431 is 13444161.

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 16144431 - 2⁵ = 16144399 is a prime.

It is a super-2 number, since 2×16144431² = 521285304627522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16144451) 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, 2690736 + ... + 2690741.

It is an arithmetic number, because the mean of its divisors is an integer number (5381478).

Almost surely, 2^16144431 is an apocalyptic number.

16144431 is a deficient number, since it is larger than the sum of its proper divisors (5381481).

16144431 is an equidigital number, since it uses as much as digits as its factorization.

16144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381480.

The product of its digits is 1152, while the sum is 24.

The square root of 16144431 is about 4018.0133150601. The cubic root of 16144431 is about 252.7401551363.

Adding to 16144431 its reverse (13444161), we get a palindrome (29588592).

The spelling of 16144431 in words is "sixteen million, one hundred forty-four thousand, four hundred thirty-one".