13220299 has 4 divisors (see below), whose sum is σ = 13263120. Its totient is φ = 13177480.

The previous prime is 13220287. The next prime is 13220309. The reversal of 13220299 is 99202231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99202231 = 1487 ⋅66713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220269) 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, 20944 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (3315780).

Almost surely, 2^13220299 is an apocalyptic number.

13220299 is a deficient number, since it is larger than the sum of its proper divisors (42821).

13220299 is an equidigital number, since it uses as much as digits as its factorization.

13220299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42820.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13220299 is about 3635.9729096901. The cubic root of 13220299 is about 236.4542326591.

The spelling of 13220299 in words is "thirteen million, two hundred twenty thousand, two hundred ninety-nine".