16343931 has 4 divisors (see below), whose sum is σ = 21791912. Its totient is φ = 10895952.

The previous prime is 16343911. The next prime is 16343939. The reversal of 16343931 is 13934361.

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

It is not a de Polignac number, because 16343931 - 2¹¹ = 16341883 is a prime.

It is a super-2 number, since 2×16343931² = 534248161065522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16343939) 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, 2723986 + ... + 2723991.

It is an arithmetic number, because the mean of its divisors is an integer number (5447978).

Almost surely, 2^16343931 is an apocalyptic number.

16343931 is a deficient number, since it is larger than the sum of its proper divisors (5447981).

16343931 is an equidigital number, since it uses as much as digits as its factorization.

16343931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447980.

The product of its digits is 5832, while the sum is 30.

The square root of 16343931 is about 4042.7627929425. The cubic root of 16343931 is about 253.7769499069.

It can be divided in two parts, 1634 and 3931, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 16343931 in words is "sixteen million, three hundred forty-three thousand, nine hundred thirty-one".