71042218 has 32 divisors (see below), whose sum is σ = 122837904. Its totient is φ = 30523392.

The previous prime is 71042171. The next prime is 71042219. The reversal of 71042218 is 81224017.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23941449 + 47100769 = 4893^2 + 6863^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71042192 and 71042201.

It is not an unprimeable number, because it can be changed into a prime (71042219) 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, 42046 + ... + 43702.

Almost surely, 2^71042218 is an apocalyptic number.

71042218 is a deficient number, since it is larger than the sum of its proper divisors (51795686).

71042218 is a wasteful number, since it uses less digits than its factorization.

71042218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 71042218 is about 8428.6545782823. The cubic root of 71042218 is about 414.1638324096.

The spelling of 71042218 in words is "seventy-one million, forty-two thousand, two hundred eighteen".