2152202821 has 2 divisors, whose sum is σ = 2152202822. Its totient is φ = 2152202820.

The previous prime is 2152202813. The next prime is 2152202837. The reversal of 2152202821 is 1282022512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1512821025 + 639381796 = 38895^2 + 25286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152202821 - 2³ = 2152202813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152202861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076101410 + 1076101411.

It is an arithmetic number, because the mean of its divisors is an integer number (1076101411).

Almost surely, 2^2152202821 is an apocalyptic number.

It is an amenable number.

2152202821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152202821 is an equidigital number, since it uses as much as digits as its factorization.

2152202821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 2152202821 is about 46391.8400260218. The cubic root of 2152202821 is about 1291.1035208085.

The spelling of 2152202821 in words is "two billion, one hundred fifty-two million, two hundred two thousand, eight hundred twenty-one".