201986835251 has 2 divisors, whose sum is σ = 201986835252. Its totient is φ = 201986835250.

The previous prime is 201986835181. The next prime is 201986835283. The reversal of 201986835251 is 152538689102.

201986835251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201986835251 - 2¹⁴ = 201986818867 is a prime.

It is a super-2 number, since 2×201986835251² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201986835251.

It is not a weakly prime, because it can be changed into another prime (201986835151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100993417625 + 100993417626.

It is an arithmetic number, because the mean of its divisors is an integer number (100993417626).

Almost surely, 2^201986835251 is an apocalyptic number.

201986835251 is a deficient number, since it is larger than the sum of its proper divisors (1).

201986835251 is an equidigital number, since it uses as much as digits as its factorization.

201986835251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 201986835251 in words is "two hundred one billion, nine hundred eighty-six million, eight hundred thirty-five thousand, two hundred fifty-one".