71822 has 4 divisors (see below), whose sum is σ = 107736. Its totient is φ = 35910.

The previous prime is 71821. The next prime is 71837. The reversal of 71822 is 22817.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 71794 and 71803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17954 + ... + 17957.

It is an arithmetic number, because the mean of its divisors is an integer number (26934).

2⁷¹⁸²² is an apocalyptic number.

71822 is a deficient number, since it is larger than the sum of its proper divisors (35914).

71822 is a wasteful number, since it uses less digits than its factorization.

71822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35913.

The product of its digits is 224, while the sum is 20.

The square root of 71822 is about 267.9962686307. The cubic root of 71822 is about 41.5673653075.

The spelling of 71822 in words is "seventy-one thousand, eight hundred twenty-two".