272731221 has 48 divisors (see below), whose sum is σ = 488412288. Its totient is φ = 143078400.

The previous prime is 272731219. The next prime is 272731237. The reversal of 272731221 is 122137272.

It is not a de Polignac number, because 272731221 - 2¹ = 272731219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272731021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40806 + ... + 47016.

It is an arithmetic number, because the mean of its divisors is an integer number (10175256).

Almost surely, 2^272731221 is an apocalyptic number.

272731221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

272731221 is a deficient number, since it is larger than the sum of its proper divisors (215681067).

272731221 is a wasteful number, since it uses less digits than its factorization.

272731221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282 (or 6279 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 272731221 is about 16514.5760163560. The cubic root of 272731221 is about 648.5024466745.

Adding to 272731221 its reverse (122137272), we get a palindrome (394868493).

It can be divided in two parts, 27273 and 1221, that multiplied together give a palindrome (33300333).

The spelling of 272731221 in words is "two hundred seventy-two million, seven hundred thirty-one thousand, two hundred twenty-one".