85865061313231 has 4 divisors (see below), whose sum is σ = 85871521717864. Its totient is φ = 85858600908600.

The previous prime is 85865061313223. The next prime is 85865061313261. The reversal of 85865061313231 is 13231316056858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85865061313231 - 2³ = 85865061313223 is a prime.

It is a super-2 number, since 2×85865061313231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85865061313261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230182380 + ... + 3230208961.

It is an arithmetic number, because the mean of its divisors is an integer number (21467880429466).

Almost surely, 2^{85865061313231} is an apocalyptic number.

85865061313231 is a deficient number, since it is larger than the sum of its proper divisors (6460404633).

85865061313231 is a wasteful number, since it uses less digits than its factorization.

85865061313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460404632.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 85865061313231 in words is "eighty-five trillion, eight hundred sixty-five billion, sixty-one million, three hundred thirteen thousand, two hundred thirty-one".