201273581 has 2 divisors, whose sum is σ = 201273582. Its totient is φ = 201273580.

The previous prime is 201273559. The next prime is 201273641. The reversal of 201273581 is 185372102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147015625 + 54257956 = 12125^2 + 7366^2 .

It is a cyclic number.

It is not a de Polignac number, because 201273581 - 2¹⁴ = 201257197 is a prime.

It is a super-2 number, since 2×201273581² = 81022108817127122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201273511) 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, 100636790 + 100636791.

It is an arithmetic number, because the mean of its divisors is an integer number (100636791).

Almost surely, 2^201273581 is an apocalyptic number.

It is an amenable number.

201273581 is a deficient number, since it is larger than the sum of its proper divisors (1).

201273581 is an equidigital number, since it uses as much as digits as its factorization.

201273581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 201273581 is about 14187.0920558090. The cubic root of 201273581 is about 586.0422465242.

The spelling of 201273581 in words is "two hundred one million, two hundred seventy-three thousand, five hundred eighty-one".