71216522 has 16 divisors (see below), whose sum is σ = 121097760. Its totient is φ = 31138992.

The previous prime is 71216507. The next prime is 71216539. The reversal of 71216522 is 22561217.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 71216491 and 71216500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71588 + ... + 72575.

It is an arithmetic number, because the mean of its divisors is an integer number (7568610).

Almost surely, 2^71216522 is an apocalyptic number.

71216522 is a deficient number, since it is larger than the sum of its proper divisors (49881238).

71216522 is a wasteful number, since it uses less digits than its factorization.

71216522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144197.

The product of its digits is 1680, while the sum is 26.

The square root of 71216522 is about 8438.9882094953. The cubic root of 71216522 is about 414.5022764815.

Adding to 71216522 its reverse (22561217), we get a palindrome (93777739).

The spelling of 71216522 in words is "seventy-one million, two hundred sixteen thousand, five hundred twenty-two".