23213251 has 4 divisors (see below), whose sum is σ = 23418792. Its totient is φ = 23007712.

The previous prime is 23213243. The next prime is 23213261. The reversal of 23213251 is 15231232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23213251 - 2³ = 23213243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23213221) 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 3 ways as a sum of consecutive naturals, for example, 102601 + ... + 102826.

It is an arithmetic number, because the mean of its divisors is an integer number (5854698).

Almost surely, 2^23213251 is an apocalyptic number.

23213251 is a deficient number, since it is larger than the sum of its proper divisors (205541).

23213251 is a wasteful number, since it uses less digits than its factorization.

23213251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205540.

The product of its digits is 360, while the sum is 19.

The square root of 23213251 is about 4818.0131797246. The cubic root of 23213251 is about 285.2629193745.

Adding to 23213251 its reverse (15231232), we get a palindrome (38444483).

The spelling of 23213251 in words is "twenty-three million, two hundred thirteen thousand, two hundred fifty-one".