2123015265 has 80 divisors (see below), whose sum is σ = 4414684032. Its totient is φ = 955950336.

The previous prime is 2123015263. The next prime is 2123015281. The reversal of 2123015265 is 5625103212.

It is a happy number.

It is not a de Polignac number, because 2123015265 - 2¹ = 2123015263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2123015263) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 184357 + ... + 195533.

Almost surely, 2^2123015265 is an apocalyptic number.

It is an amenable number.

2123015265 is an abundant number, since it is smaller than the sum of its proper divisors (2291668767).

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

2123015265 is a wasteful number, since it uses less digits than its factorization.

2123015265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11268 (or 11259 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2123015265 is about 46076.1897838786. The cubic root of 2123015265 is about 1285.2404108419.

Adding to 2123015265 its reverse (5625103212), we get a palindrome (7748118477).

The spelling of 2123015265 in words is "two billion, one hundred twenty-three million, fifteen thousand, two hundred sixty-five".