85313631 has 8 divisors (see below), whose sum is σ = 122501680. Its totient is φ = 52500672.

The previous prime is 85313609. The next prime is 85313639. The reversal of 85313631 is 13631358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85313631 - 2¹⁰ = 85312607 is a prime.

It is a super-2 number, since 2×85313631² = 14556831268808322, 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 (85313639) 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, 1093726 + ... + 1093803.

It is an arithmetic number, because the mean of its divisors is an integer number (15312710).

Almost surely, 2^85313631 is an apocalyptic number.

85313631 is a deficient number, since it is larger than the sum of its proper divisors (37188049).

85313631 is a wasteful number, since it uses less digits than its factorization.

85313631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187545.

The product of its digits is 6480, while the sum is 30.

The square root of 85313631 is about 9236.5378253976. The cubic root of 85313631 is about 440.2230807491.

Adding to 85313631 its reverse (13631358), we get a palindrome (98944989).

The spelling of 85313631 in words is "eighty-five million, three hundred thirteen thousand, six hundred thirty-one".