16344481 has 8 divisors (see below), whose sum is σ = 16673384. Its totient is φ = 16018560.

The previous prime is 16344479. The next prime is 16344539. The reversal of 16344481 is 18444361.

It can be written as a sum of positive squares in 4 ways, for example, as 781456 + 15563025 = 884^2 + 3945^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16344481 - 2¹ = 16344479 is a prime.

It is a super-2 number, since 2×16344481² = 534284118318722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16344431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12595 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (2084173).

Almost surely, 2^16344481 is an apocalyptic number.

It is an amenable number.

16344481 is a deficient number, since it is larger than the sum of its proper divisors (328903).

16344481 is a wasteful number, since it uses less digits than its factorization.

16344481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491.

The product of its digits is 9216, while the sum is 31.

The square root of 16344481 is about 4042.8308151591. The cubic root of 16344481 is about 253.7797965447.

It can be divided in two parts, 163 and 44481, that added together give a palindrome (44644).

The spelling of 16344481 in words is "sixteen million, three hundred forty-four thousand, four hundred eighty-one".