23533213 has 4 divisors (see below), whose sum is σ = 25672608. Its totient is φ = 21393820.

The previous prime is 23533207. The next prime is 23533217. The reversal of 23533213 is 31233532.

It is a happy number.

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-23533213 is a prime.

It is a super-2 number, since 2×23533213² = 1107624228206738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23533217) 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, 1069681 + ... + 1069702.

It is an arithmetic number, because the mean of its divisors is an integer number (6418152).

Almost surely, 2^23533213 is an apocalyptic number.

It is an amenable number.

23533213 is a deficient number, since it is larger than the sum of its proper divisors (2139395).

23533213 is a wasteful number, since it uses less digits than its factorization.

23533213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139394.

The product of its digits is 1620, while the sum is 22.

The square root of 23533213 is about 4851.1043072686. The cubic root of 23533213 is about 286.5675925585.

Adding to 23533213 its reverse (31233532), we get a palindrome (54766745).

The spelling of 23533213 in words is "twenty-three million, five hundred thirty-three thousand, two hundred thirteen".