23551454423221 has 2 divisors, whose sum is σ = 23551454423222. Its totient is φ = 23551454423220.

The previous prime is 23551454423137. The next prime is 23551454423227. The reversal of 23551454423221 is 12232445415532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19515976100721 + 4035478322500 = 4417689^2 + 2008850^2 .

It is a cyclic number.

It is not a de Polignac number, because 23551454423221 - 2⁹ = 23551454422709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23551454423227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11775727211610 + 11775727211611.

It is an arithmetic number, because the mean of its divisors is an integer number (11775727211611).

Almost surely, 2^{23551454423221} is an apocalyptic number.

It is an amenable number.

23551454423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23551454423221 is an equidigital number, since it uses as much as digits as its factorization.

23551454423221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152000, while the sum is 43.

Adding to 23551454423221 its reverse (12232445415532), we get a palindrome (35783899838753).

The spelling of 23551454423221 in words is "twenty-three trillion, five hundred fifty-one billion, four hundred fifty-four million, four hundred twenty-three thousand, two hundred twenty-one".