77222 has 4 divisors (see below), whose sum is σ = 115836. Its totient is φ = 38610.

The previous prime is 77213. The next prime is 77237. The reversal of 77222 is 22277.

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

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 77194 and 77203.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 77222.

It is an unprimeable number.

77222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19304 + ... + 19307.

It is an arithmetic number, because the mean of its divisors is an integer number (28959).

2⁷⁷²²² is an apocalyptic number.

77222 is a deficient number, since it is larger than the sum of its proper divisors (38614).

77222 is a wasteful number, since it uses less digits than its factorization.

77222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38613.

The product of its digits is 392, while the sum is 20.

The square root of 77222 is about 277.8884668352. Note that the first 3 decimals coincide. The cubic root of 77222 is about 42.5840551023.

Adding to 77222 its reverse (22277), we get a palindrome (99499).

Subtracting from 77222 its reverse (22277), we obtain a palindrome (54945).

The spelling of 77222 in words is "seventy-seven thousand, two hundred twenty-two", and thus it is an iban number.