16181441 has 4 divisors (see below), whose sum is σ = 16193472. Its totient is φ = 16169412.

The previous prime is 16181437. The next prime is 16181447. The reversal of 16181441 is 14418161.

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.

It is a cyclic number.

It is not a de Polignac number, because 16181441 - 2² = 16181437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16181441.

It is not an unprimeable number, because it can be changed into a prime (16181447) 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 3 ways as a sum of consecutive naturals, for example, 3701 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (4048368).

Almost surely, 2^16181441 is an apocalyptic number.

It is an amenable number.

16181441 is a deficient number, since it is larger than the sum of its proper divisors (12031).

16181441 is a wasteful number, since it uses less digits than its factorization.

16181441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030.

The product of its digits is 768, while the sum is 26.

The square root of 16181441 is about 4022.6161885022. The cubic root of 16181441 is about 252.9331375646.

The spelling of 16181441 in words is "sixteen million, one hundred eighty-one thousand, four hundred forty-one".