13212331 has 8 divisors (see below), whose sum is σ = 14471424. Its totient is φ = 11962920.

The previous prime is 13212307. The next prime is 13212337. The reversal of 13212331 is 13321231.

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 13212331 - 2⁹ = 13211819 is a prime.

It is a super-2 number, since 2×13212331² = 349131380907122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13212337) 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 7 ways as a sum of consecutive naturals, for example, 610 + ... + 5176.

It is an arithmetic number, because the mean of its divisors is an integer number (1808928).

Almost surely, 2^13212331 is an apocalyptic number.

13212331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13212331 is a deficient number, since it is larger than the sum of its proper divisors (1259093).

13212331 is a wasteful number, since it uses less digits than its factorization.

13212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841.

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

The square root of 13212331 is about 3634.8770268057. The cubic root of 13212331 is about 236.4067187068.

Adding to 13212331 its reverse (13321231), we get a palindrome (26533562).

Subtracting 13212331 from its reverse (13321231), we obtain a square (108900 = 330²).

The spelling of 13212331 in words is "thirteen million, two hundred twelve thousand, three hundred thirty-one".