2229902821 has 2 divisors, whose sum is σ = 2229902822. Its totient is φ = 2229902820.

The previous prime is 2229902797. The next prime is 2229902933. The reversal of 2229902821 is 1282099222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2144986596 + 84916225 = 46314^2 + 9215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2229902821 - 2¹³ = 2229894629 is a prime.

It is a super-2 number, since 2×2229902821² = 9944933182207516082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2229902021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114951410 + 1114951411.

It is an arithmetic number, because the mean of its divisors is an integer number (1114951411).

Almost surely, 2^2229902821 is an apocalyptic number.

It is an amenable number.

2229902821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2229902821 is an equidigital number, since it uses as much as digits as its factorization.

2229902821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 2229902821 is about 47221.8468613840. The cubic root of 2229902821 is about 1306.4575780066.

The spelling of 2229902821 in words is "two billion, two hundred twenty-nine million, nine hundred two thousand, eight hundred twenty-one".