85271581831 has 8 divisors (see below), whose sum is σ = 85648978800. Its totient is φ = 84894380160.

The previous prime is 85271581807. The next prime is 85271581877. The reversal of 85271581831 is 13818517258.

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 85271581831 - 2⁹ = 85271581319 is a prime.

It is a super-2 number, since 2×85271581831² (a number of 23 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 (85271581331) 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, 863925 + ... + 957553.

It is an arithmetic number, because the mean of its divisors is an integer number (10706122350).

Almost surely, 2^85271581831 is an apocalyptic number.

85271581831 is a deficient number, since it is larger than the sum of its proper divisors (377396969).

85271581831 is a wasteful number, since it uses less digits than its factorization.

85271581831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97649.

The product of its digits is 537600, while the sum is 49.

The spelling of 85271581831 in words is "eighty-five billion, two hundred seventy-one million, five hundred eighty-one thousand, eight hundred thirty-one".