272613221 has 4 divisors (see below), whose sum is σ = 272694252. Its totient is φ = 272532192.

The previous prime is 272613203. The next prime is 272613239. The reversal of 272613221 is 122316272.

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

It is an interprime number because it is at equal distance from previous prime (272613203) and next prime (272613239).

It can be written as a sum of positive squares in 2 ways, for example, as 261630625 + 10982596 = 16175^2 + 3314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272613221 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 (272616221) 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, 35240 + ... + 42273.

It is an arithmetic number, because the mean of its divisors is an integer number (68173563).

Almost surely, 2^272613221 is an apocalyptic number.

It is an amenable number.

272613221 is a deficient number, since it is larger than the sum of its proper divisors (81031).

272613221 is an equidigital number, since it uses as much as digits as its factorization.

272613221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81030.

The product of its digits is 2016, while the sum is 26.

The square root of 272613221 is about 16511.0030282839. The cubic root of 272613221 is about 648.4089060727.

Adding to 272613221 its reverse (122316272), we get a palindrome (394929493).

The spelling of 272613221 in words is "two hundred seventy-two million, six hundred thirteen thousand, two hundred twenty-one".