13220135 has 16 divisors (see below), whose sum is σ = 17192736. Its totient is φ = 9719808.

The previous prime is 13220131. The next prime is 13220177. The reversal of 13220135 is 53102231.

It is a cyclic number.

It is not a de Polignac number, because 13220135 - 2² = 13220131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (1074546).

Almost surely, 2^13220135 is an apocalyptic number.

13220135 is a deficient number, since it is larger than the sum of its proper divisors (3972601).

13220135 is a wasteful number, since it uses less digits than its factorization.

13220135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13220135 is about 3635.9503571969. The cubic root of 13220135 is about 236.4532549038.

Adding to 13220135 its reverse (53102231), we get a palindrome (66322366).

The spelling of 13220135 in words is "thirteen million, two hundred twenty thousand, one hundred thirty-five".