23213133 has 12 divisors (see below), whose sum is σ = 33863388. Its totient is φ = 15321600.

The previous prime is 23213131. The next prime is 23213147. The reversal of 23213133 is 33131232.

It can be written as a sum of positive squares in 2 ways, for example, as 22297284 + 915849 = 4722^2 + 957^2 .

It is not a de Polignac number, because 23213133 - 2¹ = 23213131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213131) 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 11 ways as a sum of consecutive naturals, for example, 11860 + ... + 13677.

It is an arithmetic number, because the mean of its divisors is an integer number (2821949).

Almost surely, 2^23213133 is an apocalyptic number.

It is an amenable number.

23213133 is a deficient number, since it is larger than the sum of its proper divisors (10650255).

23213133 is a wasteful number, since it uses less digits than its factorization.

23213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25644 (or 25641 counting only the distinct ones).

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

The square root of 23213133 is about 4818.0009339974. Note that the first 3 decimals coincide. The cubic root of 23213133 is about 285.2624360144.

Adding to 23213133 its reverse (33131232), we get a palindrome (56344365).

The spelling of 23213133 in words is "twenty-three million, two hundred thirteen thousand, one hundred thirty-three".