23216251 has 2 divisors, whose sum is σ = 23216252. Its totient is φ = 23216250.

The previous prime is 23216243. The next prime is 23216287. The reversal of 23216251 is 15261232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23216251 - 2³ = 23216243 is a prime.

It is not a weakly prime, because it can be changed into another prime (23210251) 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 as a sum of consecutive naturals, namely, 11608125 + 11608126.

It is an arithmetic number, because the mean of its divisors is an integer number (11608126).

Almost surely, 2^23216251 is an apocalyptic number.

23216251 is a deficient number, since it is larger than the sum of its proper divisors (1).

23216251 is an equidigital number, since it uses as much as digits as its factorization.

23216251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 23216251 is about 4818.3245013179. The cubic root of 23216251 is about 285.2752076417.

Adding to 23216251 its reverse (15261232), we get a palindrome (38477483).

The spelling of 23216251 in words is "twenty-three million, two hundred sixteen thousand, two hundred fifty-one".