272221381 has 2 divisors, whose sum is σ = 272221382. Its totient is φ = 272221380.

The previous prime is 272221349. The next prime is 272221393. The reversal of 272221381 is 183122272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217090756 + 55130625 = 14734^2 + 7425^2 .

It is a cyclic number.

It is not a de Polignac number, because 272221381 - 2⁵ = 272221349 is a prime.

It is a super-2 number, since 2×272221381² = 148208960547094322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272221981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136110690 + 136110691.

It is an arithmetic number, because the mean of its divisors is an integer number (136110691).

Almost surely, 2^272221381 is an apocalyptic number.

It is an amenable number.

272221381 is a deficient number, since it is larger than the sum of its proper divisors (1).

272221381 is an equidigital number, since it uses as much as digits as its factorization.

272221381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 272221381 is about 16499.1327347834. The cubic root of 272221381 is about 648.0980940826.

The spelling of 272221381 in words is "two hundred seventy-two million, two hundred twenty-one thousand, three hundred eighty-one".