13681233 has 12 divisors (see below), whose sum is σ = 19813248. Its totient is φ = 9097080.

The previous prime is 13681219. The next prime is 13681253. The reversal of 13681233 is 33218631.

It is a happy number.

It is not a de Polignac number, because 13681233 - 2¹² = 13677137 is a prime.

It is a super-2 number, since 2×13681233² = 374352272800578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13681197 and 13681206.

It is not an unprimeable number, because it can be changed into a prime (13681253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2116 + ... + 5642.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^13681233 is an apocalyptic number.

It is an amenable number.

13681233 is a deficient number, since it is larger than the sum of its proper divisors (6132015).

13681233 is a wasteful number, since it uses less digits than its factorization.

13681233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964 (or 3961 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13681233 is about 3698.8150805359. The cubic root of 13681233 is about 239.1709414725.

Adding to 13681233 its reverse (33218631), we get a palindrome (46899864).

It can be divided in two parts, 1368 and 1233, that added together give a square (2601 = 51²).

The spelling of 13681233 in words is "thirteen million, six hundred eighty-one thousand, two hundred thirty-three".