85130731 has 4 divisors (see below), whose sum is σ = 97292272. Its totient is φ = 72969192.

The previous prime is 85130729. The next prime is 85130741. The reversal of 85130731 is 13703158.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85130731 - 2¹ = 85130729 is a prime.

It is a super-2 number, since 2×85130731² = 14494482721188722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85130731.

It is not an unprimeable number, because it can be changed into a prime (85130741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6080760 + ... + 6080773.

It is an arithmetic number, because the mean of its divisors is an integer number (24323068).

Almost surely, 2^85130731 is an apocalyptic number.

85130731 is a deficient number, since it is larger than the sum of its proper divisors (12161541).

85130731 is a wasteful number, since it uses less digits than its factorization.

85130731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12161540.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 85130731 is about 9226.6316172263. The cubic root of 85130731 is about 439.9082642775.

Adding to 85130731 its reverse (13703158), we get a palindrome (98833889).

It can be divided in two parts, 85 and 130731, that added together give a triangular number (130816 = T₅₁₁).

The spelling of 85130731 in words is "eighty-five million, one hundred thirty thousand, seven hundred thirty-one".