551021244 has 12 divisors (see below), whose sum is σ = 1285716264. Its totient is φ = 183673744.

The previous prime is 551021243. The next prime is 551021267. The reversal of 551021244 is 442120155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×551021244² = 607248822678615072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551021243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22959207 + ... + 22959230.

It is an arithmetic number, because the mean of its divisors is an integer number (107143022).

Almost surely, 2^551021244 is an apocalyptic number.

It is an amenable number.

551021244 is an abundant number, since it is smaller than the sum of its proper divisors (734695020).

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

551021244 is a wasteful number, since it uses less digits than its factorization.

551021244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45918444 (or 45918442 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 551021244 is about 23473.8416966631. The cubic root of 551021244 is about 819.8280642885.

Adding to 551021244 its reverse (442120155), we get a palindrome (993141399).

The spelling of 551021244 in words is "five hundred fifty-one million, twenty-one thousand, two hundred forty-four".