273530221 has 8 divisors (see below), whose sum is σ = 290356920. Its totient is φ = 256785408.

The previous prime is 273530207. The next prime is 273530261. The reversal of 273530221 is 122035372.

It can be written as a sum of positive squares in 4 ways, for example, as 169286121 + 104244100 = 13011^2 + 10210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 273530221 - 2⁵ = 273530189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273530261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13516 + ... + 27013.

It is an arithmetic number, because the mean of its divisors is an integer number (36294615).

Almost surely, 2^273530221 is an apocalyptic number.

It is an amenable number.

273530221 is a deficient number, since it is larger than the sum of its proper divisors (16826699).

273530221 is a wasteful number, since it uses less digits than its factorization.

273530221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40943.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 273530221 is about 16538.7490760335. The cubic root of 273530221 is about 649.1351187446.

Adding to 273530221 its reverse (122035372), we get a palindrome (395565593).

The spelling of 273530221 in words is "two hundred seventy-three million, five hundred thirty thousand, two hundred twenty-one".