551533121 has 24 divisors (see below), whose sum is σ = 611884800. Its totient is φ = 495231840.

The previous prime is 551533069. The next prime is 551533139. The reversal of 551533121 is 121335155.

It is a happy number.

551533121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 551533121 - 2¹⁰ = 551532097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551533321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2050175 + ... + 2050443.

It is an arithmetic number, because the mean of its divisors is an integer number (25495200).

Almost surely, 2^551533121 is an apocalyptic number.

It is an amenable number.

551533121 is a deficient number, since it is larger than the sum of its proper divisors (60351679).

551533121 is a wasteful number, since it uses less digits than its factorization.

551533121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437 (or 378 counting only the distinct ones).

The product of its digits is 2250, while the sum is 26.

The square root of 551533121 is about 23484.7423021842. The cubic root of 551533121 is about 820.0818483638.

Adding to 551533121 its reverse (121335155), we get a palindrome (672868276).

The spelling of 551533121 in words is "five hundred fifty-one million, five hundred thirty-three thousand, one hundred twenty-one".