323431442021 has 4 divisors (see below), whose sum is σ = 330312962112. Its totient is φ = 316549921932.

The previous prime is 323431441981. The next prime is 323431442039. The reversal of 323431442021 is 120244134323.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323431442021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323431432021) 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, 3440759975 + ... + 3440760068.

It is an arithmetic number, because the mean of its divisors is an integer number (82578240528).

Almost surely, 2^323431442021 is an apocalyptic number.

It is an amenable number.

323431442021 is a deficient number, since it is larger than the sum of its proper divisors (6881520091).

323431442021 is an equidigital number, since it uses as much as digits as its factorization.

323431442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6881520090.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 323431442021 its reverse (120244134323), we get a palindrome (443675576344).

The spelling of 323431442021 in words is "three hundred twenty-three billion, four hundred thirty-one million, four hundred forty-two thousand, twenty-one".