865525567 has 2 divisors, whose sum is σ = 865525568. Its totient is φ = 865525566.

The previous prime is 865525537. The next prime is 865525589. The reversal of 865525567 is 765525568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865525567 - 2¹⁵ = 865492799 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 865525567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865525537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432762783 + 432762784.

It is an arithmetic number, because the mean of its divisors is an integer number (432762784).

Almost surely, 2^865525567 is an apocalyptic number.

865525567 is a deficient number, since it is larger than the sum of its proper divisors (1).

865525567 is an equidigital number, since it uses as much as digits as its factorization.

865525567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520000, while the sum is 49.

The square root of 865525567 is about 29419.8158899746. The cubic root of 865525567 is about 953.0008771835. Note that the first 3 decimals are identical.

Subtracting from 865525567 its reverse (765525568), we obtain a palindrome (99999999).

The spelling of 865525567 in words is "eight hundred sixty-five million, five hundred twenty-five thousand, five hundred sixty-seven".