2565206215 has 80 divisors (see below), whose sum is σ = 3849555456. Its totient is φ = 1624022400.

The previous prime is 2565206213. The next prime is 2565206233. The reversal of 2565206215 is 5126025652.

It is not a de Polignac number, because 2565206215 - 2¹ = 2565206213 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 (2565206213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36129630 + ... + 36129700.

Almost surely, 2^2565206215 is an apocalyptic number.

2565206215 is a deficient number, since it is larger than the sum of its proper divisors (1284349241).

2565206215 is an equidigital number, since it uses as much as digits as its factorization.

2565206215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 2565206215 is about 50647.8648612160. The cubic root of 2565206215 is about 1368.9074734134.

The spelling of 2565206215 in words is "two billion, five hundred sixty-five million, two hundred six thousand, two hundred fifteen".