71216444 has 24 divisors (see below), whose sum is σ = 136225488. Its totient is φ = 32376960.

The previous prime is 71216437. The next prime is 71216449. The reversal of 71216444 is 44461217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71216449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6737 + ... + 13704.

It is an arithmetic number, because the mean of its divisors is an integer number (5676062).

Almost surely, 2^71216444 is an apocalyptic number.

It is an amenable number.

71216444 is a deficient number, since it is larger than the sum of its proper divisors (65009044).

71216444 is a wasteful number, since it uses less digits than its factorization.

71216444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20525 (or 20523 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 71216444 is about 8438.9835880869. The cubic root of 71216444 is about 414.5021251533.

The spelling of 71216444 in words is "seventy-one million, two hundred sixteen thousand, four hundred forty-four".