229553623921 has 2 divisors, whose sum is σ = 229553623922. Its totient is φ = 229553623920.

The previous prime is 229553623919. The next prime is 229553623931. The reversal of 229553623921 is 129326355922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181795640625 + 47757983296 = 426375^2 + 218536^2 .

It is a cyclic number.

It is not a de Polignac number, because 229553623921 - 2¹ = 229553623919 is a prime.

Together with 229553623919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (229553623931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114776811960 + 114776811961.

It is an arithmetic number, because the mean of its divisors is an integer number (114776811961).

Almost surely, 2^229553623921 is an apocalyptic number.

It is an amenable number.

229553623921 is a deficient number, since it is larger than the sum of its proper divisors (1).

229553623921 is an equidigital number, since it uses as much as digits as its factorization.

229553623921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 49.

The spelling of 229553623921 in words is "two hundred twenty-nine billion, five hundred fifty-three million, six hundred twenty-three thousand, nine hundred twenty-one".