865560131 has 8 divisors (see below), whose sum is σ = 884421120. Its totient is φ = 846717768.

The previous prime is 865560121. The next prime is 865560133. The reversal of 865560131 is 131065568.

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 865560131 - 2²⁶ = 798451267 is a prime.

It is a super-2 number, since 2×865560131² = 1498388680753474322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865560091 and 865560100.

It is not an unprimeable number, because it can be changed into a prime (865560133) 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, 132500 + ... + 138878.

It is an arithmetic number, because the mean of its divisors is an integer number (110552640).

Almost surely, 2^865560131 is an apocalyptic number.

865560131 is a deficient number, since it is larger than the sum of its proper divisors (18860989).

865560131 is a wasteful number, since it uses less digits than its factorization.

865560131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 865560131 is about 29420.4033113076. The cubic root of 865560131 is about 953.0135627644.

It can be divided in two parts, 8655 and 60131, that added together give a palindrome (68786).

The spelling of 865560131 in words is "eight hundred sixty-five million, five hundred sixty thousand, one hundred thirty-one".