818531085 has 16 divisors (see below), whose sum is σ = 1337515776. Its totient is φ = 427261248.

The previous prime is 818531083. The next prime is 818531137. The reversal of 818531085 is 580135818.

It is not a de Polignac number, because 818531085 - 2¹ = 818531083 is a prime.

It is a super-2 number, since 2×818531085² = 1339986274222554450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818531081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579814 + ... + 581223.

It is an arithmetic number, because the mean of its divisors is an integer number (83594736).

Almost surely, 2^818531085 is an apocalyptic number.

It is an amenable number.

818531085 is a deficient number, since it is larger than the sum of its proper divisors (518984691).

818531085 is a wasteful number, since it uses less digits than its factorization.

818531085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161092.

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 818531085 is about 28609.9822614415. The cubic root of 818531085 is about 935.4309298826.

The spelling of 818531085 in words is "eight hundred eighteen million, five hundred thirty-one thousand, eighty-five".