23212257 has 4 divisors (see below), whose sum is σ = 30949680. Its totient is φ = 15474836.

The previous prime is 23212249. The next prime is 23212271. The reversal of 23212257 is 75221232.

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 not a de Polignac number, because 23212257 - 2³ = 23212249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23212207) 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, 3868707 + ... + 3868712.

It is an arithmetic number, because the mean of its divisors is an integer number (7737420).

Almost surely, 2^23212257 is an apocalyptic number.

It is an amenable number.

23212257 is a deficient number, since it is larger than the sum of its proper divisors (7737423).

23212257 is an equidigital number, since it uses as much as digits as its factorization.

23212257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7737422.

The product of its digits is 1680, while the sum is 24.

The square root of 23212257 is about 4817.9100240665. The cubic root of 23212257 is about 285.2588476285.

Adding to 23212257 its reverse (75221232), we get a palindrome (98433489).

It can be divided in two parts, 2321225 and 7, that added together give a palindrome (2321232).

The spelling of 23212257 in words is "twenty-three million, two hundred twelve thousand, two hundred fifty-seven".