2230001821 has 2 divisors, whose sum is σ = 2230001822. Its totient is φ = 2230001820.

The previous prime is 2230001789. The next prime is 2230001831. The reversal of 2230001821 is 1281000322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1372332025 + 857669796 = 37045^2 + 29286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2230001821 - 2⁵ = 2230001789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2230001831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115000910 + 1115000911.

It is an arithmetic number, because the mean of its divisors is an integer number (1115000911).

Almost surely, 2^2230001821 is an apocalyptic number.

It is an amenable number.

2230001821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2230001821 is an equidigital number, since it uses as much as digits as its factorization.

2230001821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2230001821 is about 47222.8950933761. The cubic root of 2230001821 is about 1306.4769117918.

The spelling of 2230001821 in words is "two billion, two hundred thirty million, one thousand, eight hundred twenty-one".