622656221 has 8 divisors (see below), whose sum is σ = 681435264. Its totient is φ = 564239520.

The previous prime is 622656179. The next prime is 622656227. The reversal of 622656221 is 122656226.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622656221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622656227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86981 + ... + 93866.

It is an arithmetic number, because the mean of its divisors is an integer number (85179408).

Almost surely, 2^622656221 is an apocalyptic number.

It is an amenable number.

622656221 is a deficient number, since it is larger than the sum of its proper divisors (58779043).

622656221 is a wasteful number, since it uses less digits than its factorization.

622656221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181171.

The product of its digits is 17280, while the sum is 32.

The square root of 622656221 is about 24953.0803910058. The cubic root of 622656221 is about 853.9178864058.

It can be divided in two parts, 62265 and 6221, that added together give a palindrome (68486).

The spelling of 622656221 in words is "six hundred twenty-two million, six hundred fifty-six thousand, two hundred twenty-one".