551444240 has 40 divisors (see below), whose sum is σ = 1284024960. Its totient is φ = 220247936.

The previous prime is 551444183. The next prime is 551444261. The reversal of 551444240 is 42444155.

It is a tau number, because it is divible by the number of its divisors (40).

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, 52727 + ... + 62313.

It is an arithmetic number, because the mean of its divisors is an integer number (32100624).

Almost surely, 2^551444240 is an apocalyptic number.

It is an amenable number.

551444240 is an abundant number, since it is smaller than the sum of its proper divisors (732580720).

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

551444240 is a wasteful number, since it uses less digits than its factorization.

551444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319 (or 10313 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 551444240 is about 23482.8499122232. The cubic root of 551444240 is about 820.0377932214.

Adding to 551444240 its reverse (42444155), we get a palindrome (593888395).

The spelling of 551444240 in words is "five hundred fifty-one million, four hundred forty-four thousand, two hundred forty".