722184221 has 4 divisors (see below), whose sum is σ = 787837344. Its totient is φ = 656531100.

The previous prime is 722184217. The next prime is 722184251. The reversal of 722184221 is 122481227.

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.

It is a cyclic number.

It is not a de Polignac number, because 722184221 - 2² = 722184217 is a prime.

It is a super-2 number, since 2×722184221² = 1043100098122753682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722184251) 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, 32826545 + ... + 32826566.

It is an arithmetic number, because the mean of its divisors is an integer number (196959336).

Almost surely, 2^722184221 is an apocalyptic number.

It is an amenable number.

722184221 is a deficient number, since it is larger than the sum of its proper divisors (65653123).

722184221 is a wasteful number, since it uses less digits than its factorization.

722184221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65653122.

The product of its digits is 3584, while the sum is 29.

The square root of 722184221 is about 26873.4854643011. The cubic root of 722184221 is about 897.1863656879.

The spelling of 722184221 in words is "seven hundred twenty-two million, one hundred eighty-four thousand, two hundred twenty-one".