865716225 has 48 divisors (see below), whose sum is σ = 1564852224. Its totient is φ = 418824000.

The previous prime is 865716223. The next prime is 865716281. The reversal of 865716225 is 522617568.

It is not a de Polignac number, because 865716225 - 2¹ = 865716223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865716221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 519744 + ... + 521406.

It is an arithmetic number, because the mean of its divisors is an integer number (32601088).

Almost surely, 2^865716225 is an apocalyptic number.

It is an amenable number.

865716225 is a deficient number, since it is larger than the sum of its proper divisors (699135999).

865716225 is a wasteful number, since it uses less digits than its factorization.

865716225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2313 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 865716225 is about 29423.0560105506. The cubic root of 865716225 is about 953.0708477341.

The spelling of 865716225 in words is "eight hundred sixty-five million, seven hundred sixteen thousand, two hundred twenty-five".