263372513 has 4 divisors (see below), whose sum is σ = 263812800. Its totient is φ = 262932228.

The previous prime is 263372507. The next prime is 263372533. The reversal of 263372513 is 315273362.

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.

It is a cyclic number.

It is not a de Polignac number, because 263372513 - 2²⁶ = 196263649 is a prime.

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 263372513.

It is not an unprimeable number, because it can be changed into a prime (263372533) 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, 219245 + ... + 220442.

It is an arithmetic number, because the mean of its divisors is an integer number (65953200).

Almost surely, 2^263372513 is an apocalyptic number.

It is an amenable number.

263372513 is a deficient number, since it is larger than the sum of its proper divisors (440287).

263372513 is an equidigital number, since it uses as much as digits as its factorization.

263372513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440286.

The product of its digits is 22680, while the sum is 32.

The square root of 263372513 is about 16228.7557440489. The cubic root of 263372513 is about 640.9982087221.

The spelling of 263372513 in words is "two hundred sixty-three million, three hundred seventy-two thousand, five hundred thirteen".