264523405 has 4 divisors (see below), whose sum is σ = 317428092. Its totient is φ = 211618720.

The previous prime is 264523381. The next prime is 264523421. The reversal of 264523405 is 504325462.

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 197627364 + 66896041 = 14058^2 + 8179^2 .

It is not a de Polignac number, because 264523405 - 2¹⁵ = 264490637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26452336 + ... + 26452345.

It is an arithmetic number, because the mean of its divisors is an integer number (79357023).

Almost surely, 2^264523405 is an apocalyptic number.

It is an amenable number.

264523405 is a deficient number, since it is larger than the sum of its proper divisors (52904687).

264523405 is an equidigital number, since it uses as much as digits as its factorization.

264523405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52904686.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 264523405 is about 16264.1755093826. The cubic root of 264523405 is about 641.9305355043.

Adding to 264523405 its reverse (504325462), we get a palindrome (768848867).

The spelling of 264523405 in words is "two hundred sixty-four million, five hundred twenty-three thousand, four hundred five".