71218854 has 36 divisors (see below), whose sum is σ = 179502804. Its totient is φ = 20347992.

The previous prime is 71218801. The next prime is 71218907. The reversal of 71218854 is 45881217.

It is an interprime number because it is at equal distance from previous prime (71218801) and next prime (71218907).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39492 + ... + 41255.

It is an arithmetic number, because the mean of its divisors is an integer number (4986189).

Almost surely, 2^71218854 is an apocalyptic number.

71218854 is an abundant number, since it is smaller than the sum of its proper divisors (108283950).

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

71218854 is a wasteful number, since it uses less digits than its factorization.

71218854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80769 (or 80759 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 71218854 is about 8439.1263765866. The cubic root of 71218854 is about 414.5068007535.

The spelling of 71218854 in words is "seventy-one million, two hundred eighteen thousand, eight hundred fifty-four".