264544243 has 4 divisors (see below), whose sum is σ = 265265440. Its totient is φ = 263823048.

The previous prime is 264544169. The next prime is 264544249. The reversal of 264544243 is 342445462.

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

It is a cyclic number.

It is not a de Polignac number, because 264544243 - 2²¹ = 262447091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 264544199 and 264544208.

It is not an unprimeable number, because it can be changed into a prime (264544249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360048 + ... + 360781.

It is an arithmetic number, because the mean of its divisors is an integer number (66316360).

Almost surely, 2^264544243 is an apocalyptic number.

264544243 is a deficient number, since it is larger than the sum of its proper divisors (721197).

264544243 is an equidigital number, since it uses as much as digits as its factorization.

264544243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721196.

The product of its digits is 92160, while the sum is 34.

The square root of 264544243 is about 16264.8161071683. The cubic root of 264544243 is about 641.9473912242.

The spelling of 264544243 in words is "two hundred sixty-four million, five hundred forty-four thousand, two hundred forty-three".