865224091 has 8 divisors (see below), whose sum is σ = 875622960. Its totient is φ = 854840448.

The previous prime is 865224089. The next prime is 865224119. The reversal of 865224091 is 190422568.

865224091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 865224091 - 2¹ = 865224089 is a prime.

It is a super-2 number, since 2×865224091² = 1497225455293552562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 865224091.

It is not an unprimeable number, because it can be changed into a prime (865224001) 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, 144540 + ... + 150406.

It is an arithmetic number, because the mean of its divisors is an integer number (109452870).

Almost surely, 2^865224091 is an apocalyptic number.

865224091 is a deficient number, since it is larger than the sum of its proper divisors (10398869).

865224091 is a wasteful number, since it uses less digits than its factorization.

865224091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 865224091 is about 29414.6917542918. The cubic root of 865224091 is about 952.8902159977.

The spelling of 865224091 in words is "eight hundred sixty-five million, two hundred twenty-four thousand, ninety-one".