13220233 has 4 divisors (see below), whose sum is σ = 14237188. Its totient is φ = 12203280.

The previous prime is 13220231. The next prime is 13220243. The reversal of 13220233 is 33202231.

13220233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1026169 + 12194064 = 1013^2 + 3492^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220233 - 2¹ = 13220231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508458 + ... + 508483.

It is an arithmetic number, because the mean of its divisors is an integer number (3559297).

Almost surely, 2^13220233 is an apocalyptic number.

13220233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13220233 is a deficient number, since it is larger than the sum of its proper divisors (1016955).

13220233 is a wasteful number, since it uses less digits than its factorization.

13220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016954.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 13220233 is about 3635.9638337035. The cubic root of 13220233 is about 236.4538391732.

Adding to 13220233 its reverse (33202231), we get a palindrome (46422464).

The spelling of 13220233 in words is "thirteen million, two hundred twenty thousand, two hundred thirty-three".