272736521 has 2 divisors, whose sum is σ = 272736522. Its totient is φ = 272736520.

The previous prime is 272736493. The next prime is 272736533. The reversal of 272736521 is 125637272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145926400 + 126810121 = 12080^2 + 11261^2 .

It is a cyclic number.

It is not a de Polignac number, because 272736521 - 2¹⁰ = 272735497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (272736571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136368260 + 136368261.

It is an arithmetic number, because the mean of its divisors is an integer number (136368261).

Almost surely, 2^272736521 is an apocalyptic number.

It is an amenable number.

272736521 is a deficient number, since it is larger than the sum of its proper divisors (1).

272736521 is an equidigital number, since it uses as much as digits as its factorization.

272736521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 272736521 is about 16514.7364798837. The cubic root of 272736521 is about 648.5066474412.

The spelling of 272736521 in words is "two hundred seventy-two million, seven hundred thirty-six thousand, five hundred twenty-one".