2865227909 has 2 divisors, whose sum is σ = 2865227910. Its totient is φ = 2865227908.

The previous prime is 2865227843. The next prime is 2865227951. The reversal of 2865227909 is 9097225682.

2865227909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2862571009 + 2656900 = 53503^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2865227909 - 2⁸ = 2865227653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2865227509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1432613954 + 1432613955.

It is an arithmetic number, because the mean of its divisors is an integer number (1432613955).

Almost surely, 2^2865227909 is an apocalyptic number.

It is an amenable number.

2865227909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2865227909 is an equidigital number, since it uses as much as digits as its factorization.

2865227909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 2865227909 is about 53527.8236901147. The cubic root of 2865227909 is about 1420.3206161247.

The spelling of 2865227909 in words is "two billion, eight hundred sixty-five million, two hundred twenty-seven thousand, nine hundred nine".