16440133 has 2 divisors, whose sum is σ = 16440134. Its totient is φ = 16440132.

The previous prime is 16440131. The next prime is 16440161. The reversal of 16440133 is 33104461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 134689 = 4038^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 16440133 - 2¹ = 16440131 is a prime.

It is a super-3 number, since 3×16440133³ (a number of 23 digits) contains 333 as substring.

Together with 16440131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16440131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220066 + 8220067.

It is an arithmetic number, because the mean of its divisors is an integer number (8220067).

Almost surely, 2^16440133 is an apocalyptic number.

It is an amenable number.

16440133 is a deficient number, since it is larger than the sum of its proper divisors (1).

16440133 is an equidigital number, since it uses as much as digits as its factorization.

16440133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 16440133 is about 4054.6433875250. The cubic root of 16440133 is about 254.2738949274.

Adding to 16440133 its reverse (33104461), we get a palindrome (49544594).

The spelling of 16440133 in words is "sixteen million, four hundred forty thousand, one hundred thirty-three".