551021241 has 4 divisors (see below), whose sum is σ = 734694992. Its totient is φ = 367347492.

The previous prime is 551021227. The next prime is 551021243. The reversal of 551021241 is 142120155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 551021241 - 2¹¹ = 551019193 is a prime.

It is a Duffinian number.

It is a Curzon 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, 91836871 + ... + 91836876.

It is an arithmetic number, because the mean of its divisors is an integer number (183673748).

Almost surely, 2^551021241 is an apocalyptic number.

It is an amenable number.

551021241 is a deficient number, since it is larger than the sum of its proper divisors (183673751).

551021241 is a wasteful number, since it uses less digits than its factorization.

551021241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183673750.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 551021241 is about 23473.8416327622. The cubic root of 551021241 is about 819.8280628007.

Adding to 551021241 its reverse (142120155), we get a palindrome (693141396).

The spelling of 551021241 in words is "five hundred fifty-one million, twenty-one thousand, two hundred forty-one".