1323215031 has 4 divisors (see below), whose sum is σ = 1764286712. Its totient is φ = 882143352.

The previous prime is 1323215029. The next prime is 1323215041. The reversal of 1323215031 is 1305123231.

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

It is not a de Polignac number, because 1323215031 - 2¹ = 1323215029 is a prime.

It is a super-2 number, since 2×1323215031² = 3501796036528661922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323214989 and 1323215007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323215021) 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 3 ways as a sum of consecutive naturals, for example, 220535836 + ... + 220535841.

It is an arithmetic number, because the mean of its divisors is an integer number (441071678).

Almost surely, 2^1323215031 is an apocalyptic number.

1323215031 is a deficient number, since it is larger than the sum of its proper divisors (441071681).

1323215031 is an equidigital number, since it uses as much as digits as its factorization.

1323215031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441071680.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1323215031 is about 36376.0227485084. The cubic root of 1323215031 is about 1097.8511855344.

Adding to 1323215031 its reverse (1305123231), we get a palindrome (2628338262).

The spelling of 1323215031 in words is "one billion, three hundred twenty-three million, two hundred fifteen thousand, thirty-one".