550251220 has 48 divisors (see below), whose sum is σ = 1223228160. Its totient is φ = 207559296.

The previous prime is 550251197. The next prime is 550251227. The reversal of 550251220 is 22152055.

It is a super-2 number, since 2×550251220² = 605552810222976800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 550251191 and 550251200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550251227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13909 + ... + 35971.

It is an arithmetic number, because the mean of its divisors is an integer number (25483920).

Almost surely, 2^550251220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550251220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611614080).

550251220 is an abundant number, since it is smaller than the sum of its proper divisors (672976940).

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

550251220 is a wasteful number, since it uses less digits than its factorization.

550251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22144 (or 22142 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 550251220 is about 23457.4342160433. The cubic root of 550251220 is about 819.4459970000.

The spelling of 550251220 in words is "five hundred fifty million, two hundred fifty-one thousand, two hundred twenty".