13223251 has 4 divisors (see below), whose sum is σ = 13231192. Its totient is φ = 13215312.

The previous prime is 13223239. The next prime is 13223269. The reversal of 13223251 is 15232231.

13223251 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15232231 = 7 ⋅2176033.

It is a cyclic number.

It is not a de Polignac number, because 13223251 - 2⁷ = 13223123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13223201) 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, 405 + ... + 5158.

It is an arithmetic number, because the mean of its divisors is an integer number (3307798).

Almost surely, 2^13223251 is an apocalyptic number.

13223251 is a deficient number, since it is larger than the sum of its proper divisors (7941).

13223251 is an equidigital number, since it uses as much as digits as its factorization.

13223251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7940.

The product of its digits is 360, while the sum is 19.

The square root of 13223251 is about 3636.3788306501. The cubic root of 13223251 is about 236.4718308730.

Adding to 13223251 its reverse (15232231), we get a palindrome (28455482).

The spelling of 13223251 in words is "thirteen million, two hundred twenty-three thousand, two hundred fifty-one".