23220313 has 2 divisors, whose sum is σ = 23220314. Its totient is φ = 23220312.

The previous prime is 23220289. The next prime is 23220319. The reversal of 23220313 is 31302232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22963264 + 257049 = 4792^2 + 507^2 .

It is a cyclic number.

It is not a de Polignac number, because 23220313 - 2²¹ = 21123161 is a prime.

It is not a weakly prime, because it can be changed into another prime (23220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610156 + 11610157.

It is an arithmetic number, because the mean of its divisors is an integer number (11610157).

Almost surely, 2^23220313 is an apocalyptic number.

It is an amenable number.

23220313 is a deficient number, since it is larger than the sum of its proper divisors (1).

23220313 is an equidigital number, since it uses as much as digits as its factorization.

23220313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23220313 is about 4818.7459987013. The cubic root of 23220313 is about 285.2918442686.

Adding to 23220313 its reverse (31302232), we get a palindrome (54522545).

The spelling of 23220313 in words is "twenty-three million, two hundred twenty thousand, three hundred thirteen".