202000081 has 2 divisors, whose sum is σ = 202000082. Its totient is φ = 202000080.

The previous prime is 202000079. The next prime is 202000087. The reversal of 202000081 is 180000202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143017681 + 58982400 = 11959^2 + 7680^2 .

It is a cyclic number.

It is not a de Polignac number, because 202000081 - 2¹ = 202000079 is a prime.

It is a super-2 number, since 2×202000081² = 81608065448013122, which contains 22 as substring.

Together with 202000079, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (202000087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000040 + 101000041.

It is an arithmetic number, because the mean of its divisors is an integer number (101000041).

Almost surely, 2^202000081 is an apocalyptic number.

It is an amenable number.

202000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

202000081 is an equidigital number, since it uses as much as digits as its factorization.

202000081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 202000081 is about 14212.6732531217. The cubic root of 202000081 is about 586.7465092708.

Adding to 202000081 its reverse (180000202), we get a palindrome (382000283).

The spelling of 202000081 in words is "two hundred two million, eighty-one", and thus it is an aban number.