71097216 has 32 divisors (see below), whose sum is σ = 188853000. Its totient is φ = 23698944.

The previous prime is 71097211. The next prime is 71097253. The reversal of 71097216 is 61279017.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71097211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92191 + ... + 92958.

Almost surely, 2^71097216 is an apocalyptic number.

It is an amenable number.

71097216 is an abundant number, since it is smaller than the sum of its proper divisors (117755784).

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

71097216 is a wasteful number, since it uses less digits than its factorization.

71097216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185166 (or 185154 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 71097216 is about 8431.9165081255. The cubic root of 71097216 is about 414.2706811147.

The spelling of 71097216 in words is "seventy-one million, ninety-seven thousand, two hundred sixteen".