553121143 has 2 divisors, whose sum is σ = 553121144. Its totient is φ = 553121142.

The previous prime is 553121137. The next prime is 553121159. The reversal of 553121143 is 341121355.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 553121143 - 2⁵ = 553121111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553121183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276560571 + 276560572.

It is an arithmetic number, because the mean of its divisors is an integer number (276560572).

Almost surely, 2^553121143 is an apocalyptic number.

553121143 is a deficient number, since it is larger than the sum of its proper divisors (1).

553121143 is an equidigital number, since it uses as much as digits as its factorization.

553121143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 553121143 is about 23518.5276537457. The cubic root of 553121143 is about 820.8681777530.

Adding to 553121143 its reverse (341121355), we get a palindrome (894242498).

The spelling of 553121143 in words is "five hundred fifty-three million, one hundred twenty-one thousand, one hundred forty-three".