264256513 has 4 divisors (see below), whose sum is σ = 269879040. Its totient is φ = 258633988.

The previous prime is 264256507. The next prime is 264256519. The reversal of 264256513 is 315652462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315652462 = 2 ⋅157826231.

It is an interprime number because it is at equal distance from previous prime (264256507) and next prime (264256519).

It is a cyclic number.

It is not a de Polignac number, because 264256513 - 2⁵ = 264256481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264256519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2811193 + ... + 2811286.

It is an arithmetic number, because the mean of its divisors is an integer number (67469760).

Almost surely, 2^264256513 is an apocalyptic number.

It is an amenable number.

264256513 is a deficient number, since it is larger than the sum of its proper divisors (5622527).

264256513 is an equidigital number, since it uses as much as digits as its factorization.

264256513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622526.

The product of its digits is 43200, while the sum is 34.

The square root of 264256513 is about 16255.9685346644. The cubic root of 264256513 is about 641.7145700187.

The spelling of 264256513 in words is "two hundred sixty-four million, two hundred fifty-six thousand, five hundred thirteen".