1323213031 has 4 divisors (see below), whose sum is σ = 1512243472. Its totient is φ = 1134182592.

The previous prime is 1323213011. The next prime is 1323213061. The reversal of 1323213031 is 1303123231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1323213031 - 2⁷ = 1323212903 is a prime.

It is a super-2 number, since 2×1323213031² = 3501785450816413922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323213011) 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, 94515210 + ... + 94515223.

It is an arithmetic number, because the mean of its divisors is an integer number (378060868).

Almost surely, 2^1323213031 is an apocalyptic number.

1323213031 is a deficient number, since it is larger than the sum of its proper divisors (189030441).

1323213031 is an equidigital number, since it uses as much as digits as its factorization.

1323213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189030440.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1323213031 is about 36375.9952578620. The cubic root of 1323213031 is about 1097.8506324111.

Adding to 1323213031 its reverse (1303123231), we get a palindrome (2626336262).

The spelling of 1323213031 in words is "one billion, three hundred twenty-three million, two hundred thirteen thousand, thirty-one".