551230020 has 108 divisors (see below), whose sum is σ = 1837961580. Its totient is φ = 133626240.

The previous prime is 551229997. The next prime is 551230027. The reversal of 551230020 is 20032155.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 265755204 + 285474816 = 16302^2 + 16896^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 551229975 and 551230002.

It is not an unprimeable number, because it can be changed into a prime (551230027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9126 + ... + 34434.

Almost surely, 2^551230020 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 551230020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918980790).

551230020 is an abundant number, since it is smaller than the sum of its proper divisors (1286731560).

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

551230020 is a wasteful number, since it uses less digits than its factorization.

551230020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25346 (or 25330 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 551230020 is about 23478.2882681000. The cubic root of 551230020 is about 819.9315925484.

Adding to 551230020 its reverse (20032155), we get a palindrome (571262175).

The spelling of 551230020 in words is "five hundred fifty-one million, two hundred thirty thousand, twenty".