81118035 has 24 divisors (see below), whose sum is σ = 140815584. Its totient is φ = 43198080.

The previous prime is 81118013. The next prime is 81118043. The reversal of 81118035 is 53081118.

It is not a de Polignac number, because 81118035 - 2⁵ = 81118003 is a prime.

It is a super-2 number, since 2×81118035² = 13160271204522450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52930 + ... + 54440.

It is an arithmetic number, because the mean of its divisors is an integer number (5867316).

Almost surely, 2^81118035 is an apocalyptic number.

81118035 is a deficient number, since it is larger than the sum of its proper divisors (59697549).

81118035 is a wasteful number, since it uses less digits than its factorization.

81118035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 81118035 is about 9006.5551128053. Note that the first 3 decimals coincide. The cubic root of 81118035 is about 432.8849369001.

The spelling of 81118035 in words is "eighty-one million, one hundred eighteen thousand, thirty-five".