551032220 has 48 divisors (see below), whose sum is σ = 1233465408. Its totient is φ = 206054400.

The previous prime is 551032213. The next prime is 551032249. The reversal of 551032220 is 22230155.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 551032192 and 551032201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45974 + ... + 56706.

It is an arithmetic number, because the mean of its divisors is an integer number (25697196).

Almost surely, 2^551032220 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 551032220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (616732704).

551032220 is an abundant number, since it is smaller than the sum of its proper divisors (682433188).

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

551032220 is a wasteful number, since it uses less digits than its factorization.

551032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910 (or 10908 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 551032220 is about 23474.0754876523. The cubic root of 551032220 is about 819.8335077405.

Adding to 551032220 its reverse (22230155), we get a palindrome (573262375).

The spelling of 551032220 in words is "five hundred fifty-one million, thirty-two thousand, two hundred twenty".