722226 has 8 divisors (see below), whose sum is σ = 1444464. Its totient is φ = 240740.

The previous prime is 722213. The next prime is 722237. The reversal of 722226 is 622227.

It is a sphenic number, since it is the product of 3 distinct primes.

722226 is an admirable number.

It is a super-2 number, since 2×722226² = 1043220790152, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60180 + ... + 60191.

It is an arithmetic number, because the mean of its divisors is an integer number (180558).

2⁷²²²²⁶ is an apocalyptic number.

722226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722226 is a wasteful number, since it uses less digits than its factorization.

722226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120376.

The product of its digits is 672, while the sum is 21.

The square root of 722226 is about 849.8388082454. The cubic root of 722226 is about 89.7203666364.

Subtracting from 722226 its reverse (622227), we obtain a palindrome (99999).

The spelling of 722226 in words is "seven hundred twenty-two thousand, two hundred twenty-six".