2565723229 has 2 divisors, whose sum is σ = 2565723230. Its totient is φ = 2565723228.

The previous prime is 2565723221. The next prime is 2565723241. The reversal of 2565723229 is 9223275652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2170628100 + 395095129 = 46590^2 + 19877^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565723229 - 2³ = 2565723221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565723221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282861614 + 1282861615.

It is an arithmetic number, because the mean of its divisors is an integer number (1282861615).

Almost surely, 2^2565723229 is an apocalyptic number.

It is an amenable number.

2565723229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565723229 is an equidigital number, since it uses as much as digits as its factorization.

2565723229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 2565723229 is about 50652.9686099443. The cubic root of 2565723229 is about 1368.9994344134. Note that the first 3 decimals are identical.

The spelling of 2565723229 in words is "two billion, five hundred sixty-five million, seven hundred twenty-three thousand, two hundred twenty-nine".