71111118 has 16 divisors (see below), whose sum is σ = 153162576. Its totient is φ = 21880320.

The previous prime is 71111113. The next prime is 71111137. The reversal of 71111118 is 81111117.

It is a super-2 number, since 2×71111118² = 10113582206419848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71111094 and 71111103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455763 + ... + 455918.

It is an arithmetic number, because the mean of its divisors is an integer number (9572661).

Almost surely, 2^71111118 is an apocalyptic number.

71111118 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

71111118 is an abundant number, since it is smaller than the sum of its proper divisors (82051458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71111118 is a wasteful number, since it uses less digits than its factorization.

71111118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911699.

The product of its digits is 56, while the sum is 21.

The square root of 71111118 is about 8432.7408355765. The cubic root of 71111118 is about 414.2976808389.

Subtracting 71111118 from its reverse (81111117), we obtain a palindrome (9999999).

The spelling of 71111118 in words is "seventy-one million, one hundred eleven thousand, one hundred eighteen".