85130831 has 8 divisors (see below), whose sum is σ = 85713264. Its totient is φ = 84551040.

The previous prime is 85130827. The next prime is 85130833. The reversal of 85130831 is 13803158.

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 85130831 - 2² = 85130827 is a prime.

It is a super-2 number, since 2×85130831² = 14494516773501122, 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 = 85130794 and 85130803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85130833) 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, 182060 + ... + 182526.

It is an arithmetic number, because the mean of its divisors is an integer number (10714158).

Almost surely, 2^85130831 is an apocalyptic number.

85130831 is a deficient number, since it is larger than the sum of its proper divisors (582433).

85130831 is a wasteful number, since it uses less digits than its factorization.

85130831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 85130831 is about 9226.6370363204. The cubic root of 85130831 is about 439.9084365256.

Adding to 85130831 its reverse (13803158), we get a palindrome (98933989).

The spelling of 85130831 in words is "eighty-five million, one hundred thirty thousand, eight hundred thirty-one".