23045221 has 2 divisors, whose sum is σ = 23045222. Its totient is φ = 23045220.

The previous prime is 23045219. The next prime is 23045237. The reversal of 23045221 is 12254032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 148996 = 4785^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 23045221 - 2¹ = 23045219 is a prime.

Together with 23045219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23045201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11522610 + 11522611.

It is an arithmetic number, because the mean of its divisors is an integer number (11522611).

Almost surely, 2^23045221 is an apocalyptic number.

It is an amenable number.

23045221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23045221 is an equidigital number, since it uses as much as digits as its factorization.

23045221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 23045221 is about 4800.5438233600. The cubic root of 23045221 is about 284.5729564164.

Adding to 23045221 its reverse (12254032), we get a palindrome (35299253).

It can be divided in two parts, 230 and 45221, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 23045221 in words is "twenty-three million, forty-five thousand, two hundred twenty-one".