85226831 has 4 divisors (see below), whose sum is σ = 90240192. Its totient is φ = 80213472.

The previous prime is 85226803. The next prime is 85226833. The reversal of 85226831 is 13862258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13862258 = 2 ⋅6931129.

It is a cyclic number.

It is not a de Polignac number, because 85226831 - 2¹⁰ = 85225807 is a prime.

It is a super-2 number, since 2×85226831² = 14527225444605122, 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 = 85226791 and 85226800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85226833) 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, 2506655 + ... + 2506688.

It is an arithmetic number, because the mean of its divisors is an integer number (22560048).

Almost surely, 2^85226831 is an apocalyptic number.

85226831 is a deficient number, since it is larger than the sum of its proper divisors (5013361).

85226831 is a wasteful number, since it uses less digits than its factorization.

85226831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5013360.

The product of its digits is 23040, while the sum is 35.

The square root of 85226831 is about 9231.8378993568. The cubic root of 85226831 is about 440.0737324784.

The spelling of 85226831 in words is "eighty-five million, two hundred twenty-six thousand, eight hundred thirty-one".