322423921 has 4 divisors (see below), whose sum is σ = 341390052. Its totient is φ = 303457792.

The previous prime is 322423903. The next prime is 322423951. The reversal of 322423921 is 129324223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129324223 = 7 ⋅18474889.

It can be written as a sum of positive squares in 2 ways, for example, as 293951025 + 28472896 = 17145^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 322423921 - 2⁵ = 322423889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 322423921.

It is not an unprimeable number, because it can be changed into a prime (322423951) 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, 9483040 + ... + 9483073.

It is an arithmetic number, because the mean of its divisors is an integer number (85347513).

Almost surely, 2^322423921 is an apocalyptic number.

It is an amenable number.

322423921 is a deficient number, since it is larger than the sum of its proper divisors (18966131).

322423921 is a wasteful number, since it uses less digits than its factorization.

322423921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18966130.

The product of its digits is 5184, while the sum is 28.

The square root of 322423921 is about 17956.1666566113. The cubic root of 322423921 is about 685.7130557662.

It can be divided in two parts, 32242 and 3921, that added together give a palindrome (36163).

The spelling of 322423921 in words is "three hundred twenty-two million, four hundred twenty-three thousand, nine hundred twenty-one".