722229 has 4 divisors (see below), whose sum is σ = 962976. Its totient is φ = 481484.

The previous prime is 722213. The next prime is 722237. The reversal of 722229 is 922227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 922227 = 3 ⋅307409.

It is a cyclic number.

It is not a de Polignac number, because 722229 - 2⁴ = 722213 is a prime.

It is a super-2 number, since 2×722229² = 1043229456882, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 722199 and 722208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120369 + ... + 120374.

It is an arithmetic number, because the mean of its divisors is an integer number (240744).

2⁷²²²²⁹ is an apocalyptic number.

It is an amenable number.

722229 is a deficient number, since it is larger than the sum of its proper divisors (240747).

722229 is a wasteful number, since it uses less digits than its factorization.

722229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240746.

The product of its digits is 1008, while the sum is 24.

The square root of 722229 is about 849.8405732842. The cubic root of 722229 is about 89.7204908638.

The spelling of 722229 in words is "seven hundred twenty-two thousand, two hundred twenty-nine".