550721622 has 64 divisors (see below), whose sum is σ = 1230598656. Its totient is φ = 162888960.

The previous prime is 550721621. The next prime is 550721623. The reversal of 550721622 is 226127055.

It is an interprime number because it is at equal distance from previous prime (550721621) and next prime (550721623).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 550721622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550721621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1094623 + ... + 1095125.

It is an arithmetic number, because the mean of its divisors is an integer number (19228104).

Almost surely, 2^550721622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550721622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615299328).

550721622 is an abundant number, since it is smaller than the sum of its proper divisors (679877034).

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

550721622 is a wasteful number, since it uses less digits than its factorization.

550721622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 550721622 is about 23467.4587887142. The cubic root of 550721622 is about 819.6794414281.

Adding to 550721622 its reverse (226127055), we get a palindrome (776848677).

The spelling of 550721622 in words is "five hundred fifty million, seven hundred twenty-one thousand, six hundred twenty-two".