201281438773 has 2 divisors, whose sum is σ = 201281438774. Its totient is φ = 201281438772.

The previous prime is 201281438719. The next prime is 201281438779. The reversal of 201281438773 is 377834182102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201257212689 + 24226084 = 448617^2 + 4922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201281438773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201281438779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100640719386 + 100640719387.

It is an arithmetic number, because the mean of its divisors is an integer number (100640719387).

Almost surely, 2^201281438773 is an apocalyptic number.

It is an amenable number.

201281438773 is a deficient number, since it is larger than the sum of its proper divisors (1).

201281438773 is an equidigital number, since it uses as much as digits as its factorization.

201281438773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 201281438773 in words is "two hundred one billion, two hundred eighty-one million, four hundred thirty-eight thousand, seven hundred seventy-three".