85007831 has 8 divisors (see below), whose sum is σ = 87089664. Its totient is φ = 82948320.

The previous prime is 85007827. The next prime is 85007851. The reversal of 85007831 is 13870058.

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 85007831 - 2² = 85007827 is a prime.

It is a super-2 number, since 2×85007831² = 14452662662649122, which 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 (85007851) 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, 2261 + ... + 13233.

It is an arithmetic number, because the mean of its divisors is an integer number (10886208).

Almost surely, 2^85007831 is an apocalyptic number.

85007831 is a deficient number, since it is larger than the sum of its proper divisors (2081833).

85007831 is a wasteful number, since it uses less digits than its factorization.

85007831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 85007831 is about 9219.9691431154. The cubic root of 85007831 is about 439.6964693789.

Adding to 85007831 its reverse (13870058), we get a palindrome (98877889).

The spelling of 85007831 in words is "eighty-five million, seven thousand, eight hundred thirty-one".