16144331 has 4 divisors (see below), whose sum is σ = 18450672. Its totient is φ = 13837992.

The previous prime is 16144327. The next prime is 16144343. The reversal of 16144331 is 13344161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13344161 = 37 ⋅360653.

It is not a de Polignac number, because 16144331 - 2² = 16144327 is a prime.

It is a super-2 number, since 2×16144331² = 521278846875122, 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 = 16144297 and 16144306.

It is not an unprimeable number, because it can be changed into a prime (16144351) 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, 1153160 + ... + 1153173.

It is an arithmetic number, because the mean of its divisors is an integer number (4612668).

Almost surely, 2^16144331 is an apocalyptic number.

16144331 is a deficient number, since it is larger than the sum of its proper divisors (2306341).

16144331 is an equidigital number, since it uses as much as digits as its factorization.

16144331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306340.

The product of its digits is 864, while the sum is 23.

The square root of 16144331 is about 4018.0008710800. Note that the first 3 decimals coincide. The cubic root of 16144331 is about 252.7396333038.

Adding to 16144331 its reverse (13344161), we get a palindrome (29488492).

The spelling of 16144331 in words is "sixteen million, one hundred forty-four thousand, three hundred thirty-one".