23216813 has 2 divisors, whose sum is σ = 23216814. Its totient is φ = 23216812.

The previous prime is 23216789. The next prime is 23216827. The reversal of 23216813 is 31861232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 157609 = 4802^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 23216813 - 2¹⁰ = 23215789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23216873) 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, 11608406 + 11608407.

It is an arithmetic number, because the mean of its divisors is an integer number (11608407).

Almost surely, 2^23216813 is an apocalyptic number.

It is an amenable number.

23216813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23216813 is an equidigital number, since it uses as much as digits as its factorization.

23216813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 23216813 is about 4818.3828199926. The cubic root of 23216813 is about 285.2775095261.

The spelling of 23216813 in words is "twenty-three million, two hundred sixteen thousand, eight hundred thirteen".