551230240 has 96 divisors (see below), whose sum is σ = 1455511680. Its totient is φ = 195532800.

The previous prime is 551230237. The next prime is 551230249. The reversal of 551230240 is 42032155.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (551230249) 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, 68341 + ... + 75979.

It is an arithmetic number, because the mean of its divisors is an integer number (15161580).

Almost surely, 2^551230240 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 551230240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727755840).

551230240 is an abundant number, since it is smaller than the sum of its proper divisors (904281440).

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

551230240 is a wasteful number, since it uses less digits than its factorization.

551230240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7706 (or 7698 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 551230240 is about 23478.2929532792. The cubic root of 551230240 is about 819.9317016286.

Adding to 551230240 its reverse (42032155), we get a palindrome (593262395).

The spelling of 551230240 in words is "five hundred fifty-one million, two hundred thirty thousand, two hundred forty".