71821316 has 12 divisors (see below), whose sum is σ = 143642688. Its totient is φ = 30780552.

The previous prime is 71821301. The next prime is 71821319. The reversal of 71821316 is 61312817.

71821316 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (71821319) 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, 1282496 + ... + 1282551.

It is an arithmetic number, because the mean of its divisors is an integer number (11970224).

Almost surely, 2^71821316 is an apocalyptic number.

It is an amenable number.

71821316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71821316 is a wasteful number, since it uses less digits than its factorization.

71821316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565058 (or 2565056 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 71821316 is about 8474.7457778980. The cubic root of 71821316 is about 415.6723335091.

The spelling of 71821316 in words is "seventy-one million, eight hundred twenty-one thousand, three hundred sixteen".