551345424 has 80 divisors (see below), whose sum is σ = 1648465920. Its totient is φ = 155525760.

The previous prime is 551345413. The next prime is 551345429. The reversal of 551345424 is 424543155.

It is not an unprimeable number, because it can be changed into a prime (551345429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16159 + ... + 36929.

It is an arithmetic number, because the mean of its divisors is an integer number (20605824).

Almost surely, 2^551345424 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 551345424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824232960).

551345424 is an abundant number, since it is smaller than the sum of its proper divisors (1097120496).

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

551345424 is a wasteful number, since it uses less digits than its factorization.

551345424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20868 (or 20862 counting only the distinct ones).

The product of its digits is 48000, while the sum is 33.

The square root of 551345424 is about 23480.7458143901. The cubic root of 551345424 is about 819.9888080963.

Adding to 551345424 its reverse (424543155), we get a palindrome (975888579).

The spelling of 551345424 in words is "five hundred fifty-one million, three hundred forty-five thousand, four hundred twenty-four".