865561422 has 16 divisors (see below), whose sum is σ = 1888497792. Its totient is φ = 262291320.

The previous prime is 865561421. The next prime is 865561423. The reversal of 865561422 is 224165568.

It is an interprime number because it is at equal distance from previous prime (865561421) and next prime (865561423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865561421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6557218 + ... + 6557349.

It is an arithmetic number, because the mean of its divisors is an integer number (118031112).

Almost surely, 2^865561422 is an apocalyptic number.

865561422 is an abundant number, since it is smaller than the sum of its proper divisors (1022936370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865561422 is a wasteful number, since it uses less digits than its factorization.

865561422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13114583.

The product of its digits is 115200, while the sum is 39.

The square root of 865561422 is about 29420.4252518552. The cubic root of 865561422 is about 953.0140365770.

It can be divided in two parts, 86556 and 1422, that added together give a palindrome (87978).

The spelling of 865561422 in words is "eight hundred sixty-five million, five hundred sixty-one thousand, four hundred twenty-two".