13220310 has 16 divisors (see below), whose sum is σ = 31728816. Its totient is φ = 3525408.

The previous prime is 13220309. The next prime is 13220329. The reversal of 13220310 is 1302231.

It is a happy number.

It is a super-2 number, since 2×13220310² = 349553192992200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220309 + ... + 220368.

It is an arithmetic number, because the mean of its divisors is an integer number (1983051).

Almost surely, 2^13220310 is an apocalyptic number.

13220310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13220310 is an abundant number, since it is smaller than the sum of its proper divisors (18508506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220310 is a wasteful number, since it uses less digits than its factorization.

13220310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440687.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13220310 is about 3635.9744223523. The cubic root of 13220310 is about 236.4542982400.

Adding to 13220310 its reverse (1302231), we get a palindrome (14522541).

It can be divided in two parts, 13220 and 310, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 13220310 in words is "thirteen million, two hundred twenty thousand, three hundred ten".