273131161 has 2 divisors, whose sum is σ = 273131162. Its totient is φ = 273131160.

The previous prime is 273131123. The next prime is 273131263. The reversal of 273131161 is 161131372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257409936 + 15721225 = 16044^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 273131161 - 2²⁷ = 138913433 is a prime.

It is a super-2 number, since 2×273131161² = 149201262218415842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (273131561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136565580 + 136565581.

It is an arithmetic number, because the mean of its divisors is an integer number (136565581).

Almost surely, 2^273131161 is an apocalyptic number.

It is an amenable number.

273131161 is a deficient number, since it is larger than the sum of its proper divisors (1).

273131161 is an equidigital number, since it uses as much as digits as its factorization.

273131161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 273131161 is about 16526.6802776601. The cubic root of 273131161 is about 648.8192853461.

It can be divided in two parts, 2731311 and 61, that added together give a palindrome (2731372).

The spelling of 273131161 in words is "two hundred seventy-three million, one hundred thirty-one thousand, one hundred sixty-one".