13213445 has 8 divisors (see below), whose sum is σ = 18121344. Its totient is φ = 9060624.

The previous prime is 13213441. The next prime is 13213451. The reversal of 13213445 is 54431231.

13213445 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13213445 - 2² = 13213441 is a prime.

It is a Duffinian number.

13213445 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 13213445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188729 + ... + 188798.

It is an arithmetic number, because the mean of its divisors is an integer number (2265168).

Almost surely, 2^13213445 is an apocalyptic number.

It is an amenable number.

13213445 is a deficient number, since it is larger than the sum of its proper divisors (4907899).

13213445 is an equidigital number, since it uses as much as digits as its factorization.

13213445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377539.

The product of its digits is 1440, while the sum is 23.

The square root of 13213445 is about 3635.0302612220. The cubic root of 13213445 is about 236.4133627447.

Adding to 13213445 its reverse (54431231), we get a palindrome (67644676).

It can be divided in two parts, 13213 and 445, that multiplied together give a palindrome (5879785).

The spelling of 13213445 in words is "thirteen million, two hundred thirteen thousand, four hundred forty-five".