200818081 has 2 divisors, whose sum is σ = 200818082. Its totient is φ = 200818080.

The previous prime is 200818073. The next prime is 200818103. The reversal of 200818081 is 180818002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200505600 + 312481 = 14160^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 200818081 - 2³ = 200818073 is a prime.

It is a super-2 number, since 2×200818081² = 80655803313045122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200818021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100409040 + 100409041.

It is an arithmetic number, because the mean of its divisors is an integer number (100409041).

Almost surely, 2^200818081 is an apocalyptic number.

It is an amenable number.

200818081 is a deficient number, since it is larger than the sum of its proper divisors (1).

200818081 is an equidigital number, since it uses as much as digits as its factorization.

200818081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 200818081 is about 14171.0296379621. The cubic root of 200818081 is about 585.5998240482.

The spelling of 200818081 in words is "two hundred million, eight hundred eighteen thousand, eighty-one".