272564381 has 4 divisors (see below), whose sum is σ = 272636700. Its totient is φ = 272492064.

The previous prime is 272564371. The next prime is 272564387. The reversal of 272564381 is 183465272.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 207504025 + 65060356 = 14405^2 + 8066^2 .

It is a cyclic number.

It is not a de Polignac number, because 272564381 - 2²² = 268370077 is a prime.

It is a super-2 number, since 2×272564381² = 148582683579826322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (272564387) 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, 30176 + ... + 38153.

It is an arithmetic number, because the mean of its divisors is an integer number (68159175).

Almost surely, 2^272564381 is an apocalyptic number.

It is an amenable number.

272564381 is a deficient number, since it is larger than the sum of its proper divisors (72319).

272564381 is an equidigital number, since it uses as much as digits as its factorization.

272564381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72318.

The product of its digits is 80640, while the sum is 38.

The square root of 272564381 is about 16509.5239483154. The cubic root of 272564381 is about 648.3701818781.

The spelling of 272564381 in words is "two hundred seventy-two million, five hundred sixty-four thousand, three hundred eighty-one".