273143375821 has 2 divisors, whose sum is σ = 273143375822. Its totient is φ = 273143375820.

The previous prime is 273143375819. The next prime is 273143375849. The reversal of 273143375821 is 128573341372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230074674921 + 43068700900 = 479661^2 + 207530^2 .

It is a cyclic number.

It is not a de Polignac number, because 273143375821 - 2¹ = 273143375819 is a prime.

Together with 273143375819, 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 (273143375221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136571687910 + 136571687911.

It is an arithmetic number, because the mean of its divisors is an integer number (136571687911).

Almost surely, 2^273143375821 is an apocalyptic number.

It is an amenable number.

273143375821 is a deficient number, since it is larger than the sum of its proper divisors (1).

273143375821 is an equidigital number, since it uses as much as digits as its factorization.

273143375821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The spelling of 273143375821 in words is "two hundred seventy-three billion, one hundred forty-three million, three hundred seventy-five thousand, eight hundred twenty-one".