264520247 has 4 divisors (see below), whose sum is σ = 264898296. Its totient is φ = 264142200.

The previous prime is 264520237. The next prime is 264520259. The reversal of 264520247 is 742025462.

264520247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 264520247 - 2²² = 260325943 is a prime.

It is a super-2 number, since 2×264520247² = 139941922145882018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264520237) 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, 187973 + ... + 189374.

It is an arithmetic number, because the mean of its divisors is an integer number (66224574).

Almost surely, 2^264520247 is an apocalyptic number.

264520247 is a deficient number, since it is larger than the sum of its proper divisors (378049).

264520247 is an equidigital number, since it uses as much as digits as its factorization.

264520247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378048.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 264520247 is about 16264.0784245527. The cubic root of 264520247 is about 641.9279809418.

The spelling of 264520247 in words is "two hundred sixty-four million, five hundred twenty thousand, two hundred forty-seven".