865220241 has 8 divisors (see below), whose sum is σ = 1155343840. Its totient is φ = 575955072.

The previous prime is 865220221. The next prime is 865220269. The reversal of 865220241 is 142022568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 865220241 - 2⁷ = 865220113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865220199 and 865220208.

It is not an unprimeable number, because it can be changed into a prime (865220201) 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, 212251 + ... + 216288.

It is an arithmetic number, because the mean of its divisors is an integer number (144417980).

Almost surely, 2^865220241 is an apocalyptic number.

It is an amenable number.

865220241 is a deficient number, since it is larger than the sum of its proper divisors (290123599).

865220241 is a wasteful number, since it uses less digits than its factorization.

865220241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429215.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 865220241 is about 29414.6263107319. The cubic root of 865220241 is about 952.8888026325. Note that the first 4 decimals are identical.

The spelling of 865220241 in words is "eight hundred sixty-five million, two hundred twenty thousand, two hundred forty-one".