264605513 has 4 divisors (see below), whose sum is σ = 271059348. Its totient is φ = 258151680.

The previous prime is 264605507. The next prime is 264605519. The reversal of 264605513 is 315506462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315506462 = 2 ⋅157753231.

It is an interprime number because it is at equal distance from previous prime (264605507) and next prime (264605519).

It can be written as a sum of positive squares in 2 ways, for example, as 147792649 + 116812864 = 12157^2 + 10808^2 .

It is a cyclic number.

It is not a de Polignac number, because 264605513 - 2¹² = 264601417 is a prime.

It is a super-3 number, since 3×264605513³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 264605513.

It is not an unprimeable number, because it can be changed into a prime (264605519) 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, 3226856 + ... + 3226937.

It is an arithmetic number, because the mean of its divisors is an integer number (67764837).

Almost surely, 2^264605513 is an apocalyptic number.

It is an amenable number.

264605513 is a deficient number, since it is larger than the sum of its proper divisors (6453835).

264605513 is an equidigital number, since it uses as much as digits as its factorization.

264605513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453834.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 264605513 is about 16266.6995115789. The cubic root of 264605513 is about 641.9969469936.

The spelling of 264605513 in words is "two hundred sixty-four million, six hundred five thousand, five hundred thirteen".