16043881 has 4 divisors (see below), whose sum is σ = 18335872. Its totient is φ = 13751892.

The previous prime is 16043837. The next prime is 16043893. The reversal of 16043881 is 18834061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18834061 = 277 ⋅67993.

It is not a de Polignac number, because 16043881 - 2⁹ = 16043369 is a prime.

It is a super-2 number, since 2×16043881² = 514812235084322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16043821) 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, 1145985 + ... + 1145998.

It is an arithmetic number, because the mean of its divisors is an integer number (4583968).

Almost surely, 2^16043881 is an apocalyptic number.

It is an amenable number.

16043881 is a deficient number, since it is larger than the sum of its proper divisors (2291991).

16043881 is an equidigital number, since it uses as much as digits as its factorization.

16043881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291990.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 16043881 is about 4005.4813693238. The cubic root of 16043881 is about 252.2143605212.

The spelling of 16043881 in words is "sixteen million, forty-three thousand, eight hundred eighty-one".