865248131 has 6 divisors (see below), whose sum is σ = 951057996. Its totient is φ = 786589100.

The previous prime is 865248091. The next prime is 865248149. The reversal of 865248131 is 131842568.

It is not a de Polignac number, because 865248131 - 2²² = 861053827 is a prime.

It is a super-2 number, since 2×865248131² = 1497308656397986322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865248151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3575285 + ... + 3575526.

It is an arithmetic number, because the mean of its divisors is an integer number (158509666).

Almost surely, 2^865248131 is an apocalyptic number.

865248131 is a deficient number, since it is larger than the sum of its proper divisors (85809865).

865248131 is a wasteful number, since it uses less digits than its factorization.

865248131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150833 (or 7150822 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 865248131 is about 29415.1003907857. The cubic root of 865248131 is about 952.8990411752.

The spelling of 865248131 in words is "eight hundred sixty-five million, two hundred forty-eight thousand, one hundred thirty-one".