551241143 has 4 divisors (see below), whose sum is σ = 551602728. Its totient is φ = 550879560.

The previous prime is 551241139. The next prime is 551241149. The reversal of 551241143 is 341142155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551241143 - 2² = 551241139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551241149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178496 + ... + 181557.

It is an arithmetic number, because the mean of its divisors is an integer number (137900682).

Almost surely, 2^551241143 is an apocalyptic number.

551241143 is a deficient number, since it is larger than the sum of its proper divisors (361585).

551241143 is a wasteful number, since it uses less digits than its factorization.

551241143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361584.

The product of its digits is 2400, while the sum is 26.

The square root of 551241143 is about 23478.5251453323. The cubic root of 551241143 is about 819.9371075103.

Adding to 551241143 its reverse (341142155), we get a palindrome (892383298).

The spelling of 551241143 in words is "five hundred fifty-one million, two hundred forty-one thousand, one hundred forty-three".