13220263 has 4 divisors (see below), whose sum is σ = 15108880. Its totient is φ = 11331648.

The previous prime is 13220261. The next prime is 13220269. The reversal of 13220263 is 36202231.

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

It is a cyclic number.

It is not a de Polignac number, because 13220263 - 2¹ = 13220261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13220263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220261) 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, 944298 + ... + 944311.

It is an arithmetic number, because the mean of its divisors is an integer number (3777220).

Almost surely, 2^13220263 is an apocalyptic number.

13220263 is a deficient number, since it is larger than the sum of its proper divisors (1888617).

13220263 is an equidigital number, since it uses as much as digits as its factorization.

13220263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888616.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 13220263 is about 3635.9679591548. The cubic root of 13220263 is about 236.4540180306.

Adding to 13220263 its reverse (36202231), we get a palindrome (49422494).

The spelling of 13220263 in words is "thirteen million, two hundred twenty thousand, two hundred sixty-three".