71321118 has 32 divisors (see below), whose sum is σ = 156504960. Its totient is φ = 21488160.

The previous prime is 71321113. The next prime is 71321141. The reversal of 71321118 is 81112317.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71321113) 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, 8796 + ... + 14832.

It is an arithmetic number, because the mean of its divisors is an integer number (4890780).

Almost surely, 2^71321118 is an apocalyptic number.

71321118 is an abundant number, since it is smaller than the sum of its proper divisors (85183842).

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

71321118 is a wasteful number, since it uses less digits than its factorization.

71321118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232.

The product of its digits is 336, while the sum is 24.

The square root of 71321118 is about 8445.1831241247. The cubic root of 71321118 is about 414.7051042843.

It can be divided in two parts, 7 and 1321118, that added together give a triangular number (1321125 = T₁₆₂₅).

The spelling of 71321118 in words is "seventy-one million, three hundred twenty-one thousand, one hundred eighteen".