272249821 has 2 divisors, whose sum is σ = 272249822. Its totient is φ = 272249820.

The previous prime is 272249797. The next prime is 272249867. The reversal of 272249821 is 128942272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214944921 + 57304900 = 14661^2 + 7570^2 .

It is a cyclic number.

It is not a de Polignac number, because 272249821 - 2²⁵ = 238695389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272249891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136124910 + 136124911.

It is an arithmetic number, because the mean of its divisors is an integer number (136124911).

Almost surely, 2^272249821 is an apocalyptic number.

It is an amenable number.

272249821 is a deficient number, since it is larger than the sum of its proper divisors (1).

272249821 is an equidigital number, since it uses as much as digits as its factorization.

272249821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 272249821 is about 16499.9945757567. The cubic root of 272249821 is about 648.1206630519.

The spelling of 272249821 in words is "two hundred seventy-two million, two hundred forty-nine thousand, eight hundred twenty-one".