865225481 has 2 divisors, whose sum is σ = 865225482. Its totient is φ = 865225480.

The previous prime is 865225447. The next prime is 865225511. The reversal of 865225481 is 184522568.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670343881 + 194881600 = 25891^2 + 13960^2 .

It is a cyclic number.

It is not a de Polignac number, because 865225481 - 2²² = 861031177 is a prime.

It is a super-2 number, since 2×865225481² = 1497230265943362722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (865221481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432612740 + 432612741.

It is an arithmetic number, because the mean of its divisors is an integer number (432612741).

Almost surely, 2^865225481 is an apocalyptic number.

It is an amenable number.

865225481 is a deficient number, since it is larger than the sum of its proper divisors (1).

865225481 is an equidigital number, since it uses as much as digits as its factorization.

865225481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153600, while the sum is 41.

The square root of 865225481 is about 29414.7153819309. The cubic root of 865225481 is about 952.8907262766.

The spelling of 865225481 in words is "eight hundred sixty-five million, two hundred twenty-five thousand, four hundred eighty-one".