553143121 has 2 divisors, whose sum is σ = 553143122. Its totient is φ = 553143120.

The previous prime is 553143109. The next prime is 553143131. The reversal of 553143121 is 121341355.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478078225 + 75064896 = 21865^2 + 8664^2 .

It is a cyclic number.

It is not a de Polignac number, because 553143121 - 2²⁵ = 519588689 is a prime.

It is not a weakly prime, because it can be changed into another prime (553143131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276571560 + 276571561.

It is an arithmetic number, because the mean of its divisors is an integer number (276571561).

Almost surely, 2^553143121 is an apocalyptic number.

It is an amenable number.

553143121 is a deficient number, since it is larger than the sum of its proper divisors (1).

553143121 is an equidigital number, since it uses as much as digits as its factorization.

553143121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 553143121 is about 23518.9948977417. The cubic root of 553143121 is about 820.8790498752.

Adding to 553143121 its reverse (121341355), we get a palindrome (674484476).

The spelling of 553143121 in words is "five hundred fifty-three million, one hundred forty-three thousand, one hundred twenty-one".