1323213231 has 8 divisors (see below), whose sum is σ = 1801822464. Its totient is φ = 863373080.

The previous prime is 1323213209. The next prime is 1323213233. The reversal of 1323213231 is 1323123231.

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

It is not a de Polignac number, because 1323213231 - 2⁷ = 1323213103 is a prime.

It is a super-2 number, since 2×1323213231² = 3501786509386918722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1323213198 and 1323213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323213233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4692105 + ... + 4692386.

It is an arithmetic number, because the mean of its divisors is an integer number (225227808).

Almost surely, 2^1323213231 is an apocalyptic number.

1323213231 is a deficient number, since it is larger than the sum of its proper divisors (478609233).

1323213231 is an equidigital number, since it uses as much as digits as its factorization.

1323213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384541.

The product of its digits is 648, while the sum is 21.

The square root of 1323213231 is about 36375.9980069276. The cubic root of 1323213231 is about 1097.8506877234.

Adding to 1323213231 its reverse (1323123231), we get a palindrome (2646336462).

Subtracting from 1323213231 its reverse (1323123231), we obtain a square (90000 = 300²).

The spelling of 1323213231 in words is "one billion, three hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-one".