71821162 has 24 divisors (see below), whose sum is σ = 126044100. Its totient is φ = 30602880.

The previous prime is 71821153. The next prime is 71821163. The reversal of 71821162 is 26112817.

It can be written as a sum of positive squares in 2 ways, for example, as 56836521 + 14984641 = 7539^2 + 3871^2 .

It is a super-2 number, since 2×71821162² = 10316558622060488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71821162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71821163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15714 + ... + 19762.

Almost surely, 2^71821162 is an apocalyptic number.

71821162 is a deficient number, since it is larger than the sum of its proper divisors (54222938).

71821162 is a wasteful number, since it uses less digits than its factorization.

71821162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246 (or 4239 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 71821162 is about 8474.7366920749. The cubic root of 71821162 is about 415.6720364126.

Adding to 71821162 its reverse (26112817), we get a palindrome (97933979).

The spelling of 71821162 in words is "seventy-one million, eight hundred twenty-one thousand, one hundred sixty-two".