71002218 has 16 divisors (see below), whose sum is σ = 162290880. Its totient is φ = 20286336.

The previous prime is 71002199. The next prime is 71002247. The reversal of 71002218 is 81220017.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 71002194 and 71002203.

It is an unprimeable number.

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, 845223 + ... + 845306.

It is an arithmetic number, because the mean of its divisors is an integer number (10143180).

Almost surely, 2^71002218 is an apocalyptic number.

71002218 is an abundant number, since it is smaller than the sum of its proper divisors (91288662).

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

71002218 is a wasteful number, since it uses less digits than its factorization.

71002218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690541.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 71002218 is about 8426.2813862344. The cubic root of 71002218 is about 414.0860867912.

The spelling of 71002218 in words is "seventy-one million, two thousand, two hundred eighteen".