551521344 has 112 divisors (see below), whose sum is σ = 1685641536. Its totient is φ = 157286400.

The previous prime is 551521343. The next prime is 551521363. The reversal of 551521344 is 443125155.

It is not an unprimeable number, because it can be changed into a prime (551521343) 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, 28224 + ... + 43584.

Almost surely, 2^551521344 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 551521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842820768).

551521344 is an abundant number, since it is smaller than the sum of its proper divisors (1134120192).

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

551521344 is a wasteful number, since it uses less digits than its factorization.

551521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15404 (or 15394 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 551521344 is about 23484.4915635830. The cubic root of 551521344 is about 820.0760111969.

Adding to 551521344 its reverse (443125155), we get a palindrome (994646499).

The spelling of 551521344 in words is "five hundred fifty-one million, five hundred twenty-one thousand, three hundred forty-four".