226642623421 has 2 divisors, whose sum is σ = 226642623422. Its totient is φ = 226642623420.

The previous prime is 226642623373. The next prime is 226642623443. The reversal of 226642623421 is 124326246622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134257020921 + 92385602500 = 366411^2 + 303950^2 .

It is a cyclic number.

It is not a de Polignac number, because 226642623421 - 2¹⁵ = 226642590653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226642623481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113321311710 + 113321311711.

It is an arithmetic number, because the mean of its divisors is an integer number (113321311711).

Almost surely, 2^226642623421 is an apocalyptic number.

It is an amenable number.

226642623421 is a deficient number, since it is larger than the sum of its proper divisors (1).

226642623421 is an equidigital number, since it uses as much as digits as its factorization.

226642623421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 40.

The spelling of 226642623421 in words is "two hundred twenty-six billion, six hundred forty-two million, six hundred twenty-three thousand, four hundred twenty-one".