551434240 has 192 divisors, whose sum is σ = 1552824000. Its totient is φ = 187858944.

The previous prime is 551434211. The next prime is 551434241. The reversal of 551434240 is 42434155.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 551434199 and 551434208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551434241) 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, 3512242 + ... + 3512398.

It is an arithmetic number, because the mean of its divisors is an integer number (8087625).

Almost surely, 2^551434240 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 551434240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776412000).

551434240 is an abundant number, since it is smaller than the sum of its proper divisors (1001389760).

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

551434240 is an equidigital number, since it uses as much as digits as its factorization.

551434240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 551434240 is about 23482.6369899124. The cubic root of 551434240 is about 820.0328362817.

Adding to 551434240 its reverse (42434155), we get a palindrome (593868395).

The spelling of 551434240 in words is "five hundred fifty-one million, four hundred thirty-four thousand, two hundred forty".