13212313 has 4 divisors (see below), whose sum is σ = 13667940. Its totient is φ = 12756688.

The previous prime is 13212307. The next prime is 13212337. The reversal of 13212313 is 31321231.

13212313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31321231 = 5107 ⋅6133.

It can be written as a sum of positive squares in 2 ways, for example, as 9018009 + 4194304 = 3003^2 + 2048^2 .

It is a cyclic number.

It is not a de Polignac number, because 13212313 - 2⁹ = 13211801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13212013) 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, 227770 + ... + 227827.

It is an arithmetic number, because the mean of its divisors is an integer number (3416985).

Almost surely, 2^13212313 is an apocalyptic number.

It is an amenable number.

13212313 is a deficient number, since it is larger than the sum of its proper divisors (455627).

13212313 is an equidigital number, since it uses as much as digits as its factorization.

13212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455626.

The product of its digits is 108, while the sum is 16.

The square root of 13212313 is about 3634.8745507926. The cubic root of 13212313 is about 236.4066113495.

Adding to 13212313 its reverse (31321231), we get a palindrome (44533544).

It can be divided in two parts, 1321231 and 3, that multiplied together give a palindrome (3963693).

The spelling of 13212313 in words is "thirteen million, two hundred twelve thousand, three hundred thirteen".