13530233 has 6 divisors (see below), whose sum is σ = 14144634. Its totient is φ = 12941456.

The previous prime is 13530203. The next prime is 13530259. The reversal of 13530233 is 33203531.

It can be written as a sum of positive squares in only one way, i.e., 8133904 + 5396329 = 2852^2 + 2323^2 .

It is not a de Polignac number, because 13530233 - 2⁶ = 13530169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12260 + ... + 13317.

It is an arithmetic number, because the mean of its divisors is an integer number (2357439).

Almost surely, 2^13530233 is an apocalyptic number.

It is an amenable number.

13530233 is a deficient number, since it is larger than the sum of its proper divisors (614401).

13530233 is an equidigital number, since it uses as much as digits as its factorization.

13530233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25623 (or 25600 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 13530233 is about 3678.3465035257. The cubic root of 13530233 is about 238.2877730354.

Adding to 13530233 its reverse (33203531), we get a palindrome (46733764).

The spelling of 13530233 in words is "thirteen million, five hundred thirty thousand, two hundred thirty-three".