71442216 has 64 divisors (see below), whose sum is σ = 200275200. Its totient is φ = 23595264.

The previous prime is 71442193. The next prime is 71442229. The reversal of 71442216 is 61224417.

71442216 is a `hidden beast` number, since 7 + 1 + 442 + 216 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 71442216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22945 + ... + 25871.

It is an arithmetic number, because the mean of its divisors is an integer number (3129300).

Almost surely, 2^71442216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71442216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100137600).

71442216 is an abundant number, since it is smaller than the sum of its proper divisors (128832984).

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

71442216 is a wasteful number, since it uses less digits than its factorization.

71442216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3055 (or 3045 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 71442216 is about 8452.3497324708. The cubic root of 71442216 is about 414.9396844650.

The spelling of 71442216 in words is "seventy-one million, four hundred forty-two thousand, two hundred sixteen".