273135221 has 4 divisors (see below), whose sum is σ = 280517292. Its totient is φ = 265753152.

The previous prime is 273135197. The next prime is 273135223. The reversal of 273135221 is 122531372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120340900 + 152794321 = 10970^2 + 12361^2 .

It is a cyclic number.

It is not a de Polignac number, because 273135221 - 2¹⁴ = 273118837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273135223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690980 + ... + 3691053.

It is an arithmetic number, because the mean of its divisors is an integer number (70129323).

Almost surely, 2^273135221 is an apocalyptic number.

It is an amenable number.

273135221 is a deficient number, since it is larger than the sum of its proper divisors (7382071).

273135221 is an equidigital number, since it uses as much as digits as its factorization.

273135221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7382070.

The product of its digits is 2520, while the sum is 26.

The square root of 273135221 is about 16526.8031088895. The cubic root of 273135221 is about 648.8225001547.

Adding to 273135221 its reverse (122531372), we get a palindrome (395666593).

The spelling of 273135221 in words is "two hundred seventy-three million, one hundred thirty-five thousand, two hundred twenty-one".