865055851 has 8 divisors (see below), whose sum is σ = 944000064. Its totient is φ = 786162120.

The previous prime is 865055839. The next prime is 865055857. The reversal of 865055851 is 158550568.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865055851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865055798 and 865055807.

It is not an unprimeable number, because it can be changed into a prime (865055857) 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, 29280 + ... + 50866.

It is an arithmetic number, because the mean of its divisors is an integer number (118000008).

Almost surely, 2^865055851 is an apocalyptic number.

865055851 is a deficient number, since it is larger than the sum of its proper divisors (78944213).

865055851 is a wasteful number, since it uses less digits than its factorization.

865055851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25241.

The product of its (nonzero) digits is 240000, while the sum is 43.

The square root of 865055851 is about 29411.8318198646. The cubic root of 865055851 is about 952.8284498635.

The spelling of 865055851 in words is "eight hundred sixty-five million, fifty-five thousand, eight hundred fifty-one".