551243320 has 32 divisors (see below), whose sum is σ = 1244736720. Its totient is φ = 219708160.

The previous prime is 551243317. The next prime is 551243321. The reversal of 551243320 is 23342155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551243321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13282 + ... + 35761.

Almost surely, 2^551243320 is an apocalyptic number.

It is an amenable number.

551243320 is an abundant number, since it is smaller than the sum of its proper divisors (693493400).

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

551243320 is a wasteful number, since it uses less digits than its factorization.

551243320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49335 (or 49331 counting only the distinct ones).

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

The square root of 551243320 is about 23478.5715068017. The cubic root of 551243320 is about 819.9381868932.

Adding to 551243320 its reverse (23342155), we get a palindrome (574585475).

The spelling of 551243320 in words is "five hundred fifty-one million, two hundred forty-three thousand, three hundred twenty".