551321240 has 32 divisors (see below), whose sum is σ = 1245641760. Its totient is φ = 219609600.

The previous prime is 551321231. The next prime is 551321273. The reversal of 551321240 is 42123155.

551321240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18956 + ... + 38235.

It is an arithmetic number, because the mean of its divisors is an integer number (38926305).

Almost surely, 2^551321240 is an apocalyptic number.

It is an amenable number.

551321240 is an abundant number, since it is smaller than the sum of its proper divisors (694320520).

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

551321240 is a wasteful number, since it uses less digits than its factorization.

551321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57443 (or 57439 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 551321240 is about 23480.2308336183. The cubic root of 551321240 is about 819.9768186982.

Adding to 551321240 its reverse (42123155), we get a palindrome (593444395).

The spelling of 551321240 in words is "five hundred fifty-one million, three hundred twenty-one thousand, two hundred forty".