265206320 has 20 divisors (see below), whose sum is σ = 616604880. Its totient is φ = 106082496.

The previous prime is 265206287. The next prime is 265206323. The reversal of 265206320 is 23602562.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 265206320.

It is not an unprimeable number, because it can be changed into a prime (265206323) 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, 1657460 + ... + 1657619.

It is an arithmetic number, because the mean of its divisors is an integer number (30830244).

Almost surely, 2^265206320 is an apocalyptic number.

265206320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265206320 is an abundant number, since it is smaller than the sum of its proper divisors (351398560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265206320 is a wasteful number, since it uses less digits than its factorization.

265206320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315092 (or 3315086 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 265206320 is about 16285.1564315483. The cubic root of 265206320 is about 642.4824807105.

Adding to 265206320 its reverse (23602562), we get a palindrome (288808882).

The spelling of 265206320 in words is "two hundred sixty-five million, two hundred six thousand, three hundred twenty".