551332240 has 80 divisors (see below), whose sum is σ = 1318540608. Its totient is φ = 214276608.

The previous prime is 551332237. The next prime is 551332247. The reversal of 551332240 is 42233155.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (551332247) 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, 1007647 + ... + 1008193.

Almost surely, 2^551332240 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 551332240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659270304).

551332240 is an abundant number, since it is smaller than the sum of its proper divisors (767208368).

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

551332240 is a wasteful number, since it uses less digits than its factorization.

551332240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 551332240 is about 23480.4650720551. The cubic root of 551332240 is about 819.9822720736.

Adding to 551332240 its reverse (42233155), we get a palindrome (593565395).

The spelling of 551332240 in words is "five hundred fifty-one million, three hundred thirty-two thousand, two hundred forty".