23331321 has 20 divisors (see below), whose sum is σ = 37535652. Its totient is φ = 14357088.

The previous prime is 23331281. The next prime is 23331353. The reversal of 23331321 is 12313332.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 11634921 = 3420^2 + 3411^2 .

It is not a de Polignac number, because 23331321 - 2⁷ = 23331193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23331294 and 23331303.

It is not an unprimeable number, because it can be changed into a prime (23331391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10026 + ... + 12131.

Almost surely, 2^23331321 is an apocalyptic number.

It is an amenable number.

23331321 is a deficient number, since it is larger than the sum of its proper divisors (14204331).

23331321 is a wasteful number, since it uses less digits than its factorization.

23331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22182 (or 22173 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 23331321 is about 4830.2506146162. The cubic root of 23331321 is about 285.7457477616.

Adding to 23331321 its reverse (12313332), we get a palindrome (35644653).

The spelling of 23331321 in words is "twenty-three million, three hundred thirty-one thousand, three hundred twenty-one".