13331643 has 16 divisors (see below), whose sum is σ = 19762176. Its totient is φ = 7938720.

The previous prime is 13331641. The next prime is 13331663. The reversal of 13331643 is 34613331.

It is not a de Polignac number, because 13331643 - 2¹ = 13331641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13331641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4305 + ... + 6722.

It is an arithmetic number, because the mean of its divisors is an integer number (1235136).

Almost surely, 2^13331643 is an apocalyptic number.

13331643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13331643 is a deficient number, since it is larger than the sum of its proper divisors (6430533).

13331643 is a wasteful number, since it uses less digits than its factorization.

13331643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074.

The product of its digits is 1944, while the sum is 24.

The square root of 13331643 is about 3651.2522509408. The cubic root of 13331643 is about 237.1161993170.

Adding to 13331643 its reverse (34613331), we get a palindrome (47944974).

The spelling of 13331643 in words is "thirteen million, three hundred thirty-one thousand, six hundred forty-three".