265240013 has 4 divisors (see below), whose sum is σ = 272408700. Its totient is φ = 258071328.

The previous prime is 265240009. The next prime is 265240033. The reversal of 265240013 is 310042562.

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 198866404 + 66373609 = 14102^2 + 8147^2 .

It is a cyclic number.

It is not a de Polignac number, because 265240013 - 2² = 265240009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265240033) 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, 3584288 + ... + 3584361.

It is an arithmetic number, because the mean of its divisors is an integer number (68102175).

Almost surely, 2^265240013 is an apocalyptic number.

It is an amenable number.

265240013 is a deficient number, since it is larger than the sum of its proper divisors (7168687).

265240013 is an equidigital number, since it uses as much as digits as its factorization.

265240013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7168686.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 265240013 is about 16286.1908683400. The cubic root of 265240013 is about 642.5096875101.

Adding to 265240013 its reverse (310042562), we get a palindrome (575282575).

The spelling of 265240013 in words is "two hundred sixty-five million, two hundred forty thousand, thirteen".