13213660 has 12 divisors (see below), whose sum is σ = 27748728. Its totient is φ = 5285456.

The previous prime is 13213579. The next prime is 13213667. The reversal of 13213660 is 6631231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213667) 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, 330322 + ... + 330361.

It is an arithmetic number, because the mean of its divisors is an integer number (2312394).

Almost surely, 2^13213660 is an apocalyptic number.

13213660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13213660 is an abundant number, since it is smaller than the sum of its proper divisors (14535068).

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

13213660 is a wasteful number, since it uses less digits than its factorization.

13213660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660692 (or 660690 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13213660 is about 3635.0598344456. The cubic root of 13213660 is about 236.4146449891.

Adding to 13213660 its reverse (6631231), we get a palindrome (19844891).

The spelling of 13213660 in words is "thirteen million, two hundred thirteen thousand, six hundred sixty".