5551207220 has 72 divisors (see below), whose sum is σ = 12655736856. Its totient is φ = 2044403712.

The previous prime is 5551207201. The next prime is 5551207237. The reversal of 5551207220 is 227021555.

It can be written as a sum of positive squares in 12 ways, for example, as 4995945124 + 555262096 = 70682^2 + 23564^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1461644 + ... + 1465436.

It is an arithmetic number, because the mean of its divisors is an integer number (175774123).

Almost surely, 2^5551207220 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 5551207220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6327868428).

5551207220 is an abundant number, since it is smaller than the sum of its proper divisors (7104529636).

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

5551207220 is a wasteful number, since it uses less digits than its factorization.

5551207220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 5551207220 is about 74506.4240183355. The cubic root of 5551207220 is about 1770.6354150913.

Adding to 5551207220 its reverse (227021555), we get a palindrome (5778228775).

The spelling of 5551207220 in words is "five billion, five hundred fifty-one million, two hundred seven thousand, two hundred twenty".