323431121 has 4 divisors (see below), whose sum is σ = 348310452. Its totient is φ = 298551792.

The previous prime is 323431117. The next prime is 323431123. The reversal of 323431121 is 121134323.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121134323 = 281 ⋅431083.

It can be written as a sum of positive squares in 2 ways, for example, as 197093521 + 126337600 = 14039^2 + 11240^2 .

It is a cyclic number.

It is not a de Polignac number, because 323431121 - 2² = 323431117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 323431093 and 323431102.

It is not an unprimeable number, because it can be changed into a prime (323431123) 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, 12439646 + ... + 12439671.

It is an arithmetic number, because the mean of its divisors is an integer number (87077613).

Almost surely, 2^323431121 is an apocalyptic number.

It is an amenable number.

323431121 is a deficient number, since it is larger than the sum of its proper divisors (24879331).

323431121 is a wasteful number, since it uses less digits than its factorization.

323431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24879330.

The product of its digits is 432, while the sum is 20.

The square root of 323431121 is about 17984.1908630886. The cubic root of 323431121 is about 686.4263323261.

Adding to 323431121 its reverse (121134323), we get a palindrome (444565444).

The spelling of 323431121 in words is "three hundred twenty-three million, four hundred thirty-one thousand, one hundred twenty-one".