202055509 has 2 divisors, whose sum is σ = 202055510. Its totient is φ = 202055508.

The previous prime is 202055507. The next prime is 202055521. The reversal of 202055509 is 905550202.

202055509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186868900 + 15186609 = 13670^2 + 3897^2 .

It is a cyclic number.

It is not a de Polignac number, because 202055509 - 2¹ = 202055507 is a prime.

Together with 202055507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202055501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101027754 + 101027755.

It is an arithmetic number, because the mean of its divisors is an integer number (101027755).

Almost surely, 2^202055509 is an apocalyptic number.

It is an amenable number.

202055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

202055509 is an equidigital number, since it uses as much as digits as its factorization.

202055509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 202055509 is about 14214.6230692200. The cubic root of 202055509 is about 586.8001713141.

The spelling of 202055509 in words is "two hundred two million, fifty-five thousand, five hundred nine".