204721628233 has 2 divisors, whose sum is σ = 204721628234. Its totient is φ = 204721628232.

The previous prime is 204721628231. The next prime is 204721628261. The reversal of 204721628233 is 332826127402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201737519104 + 2984109129 = 449152^2 + 54627^2 .

It is a cyclic number.

It is not a de Polignac number, because 204721628233 - 2¹ = 204721628231 is a prime.

Together with 204721628231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204721628231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102360814116 + 102360814117.

It is an arithmetic number, because the mean of its divisors is an integer number (102360814117).

Almost surely, 2^204721628233 is an apocalyptic number.

It is an amenable number.

204721628233 is a deficient number, since it is larger than the sum of its proper divisors (1).

204721628233 is an equidigital number, since it uses as much as digits as its factorization.

204721628233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 204721628233 in words is "two hundred four billion, seven hundred twenty-one million, six hundred twenty-eight thousand, two hundred thirty-three".