71216370 has 48 divisors (see below), whose sum is σ = 194912640. Its totient is φ = 17991072.

The previous prime is 71216357. The next prime is 71216371. The reversal of 71216370 is 7361217.

71216370 is a `hidden beast` number, since 7 + 1 + 21 + 637 + 0 = 666.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (71216371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19114 + ... + 22533.

It is an arithmetic number, because the mean of its divisors is an integer number (4060680).

Almost surely, 2^71216370 is an apocalyptic number.

71216370 is an abundant number, since it is smaller than the sum of its proper divisors (123696270).

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

71216370 is a wasteful number, since it uses less digits than its factorization.

71216370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41679 (or 41676 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 71216370 is about 8438.9792036715. The cubic root of 71216370 is about 414.5019815855.

Adding to 71216370 its reverse (7361217), we get a palindrome (78577587).

The spelling of 71216370 in words is "seventy-one million, two hundred sixteen thousand, three hundred seventy".