553534021 has 2 divisors, whose sum is σ = 553534022. Its totient is φ = 553534020.

The previous prime is 553534013. The next prime is 553534043. The reversal of 553534021 is 120435355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415588996 + 137945025 = 20386^2 + 11745^2 .

It is a cyclic number.

It is not a de Polignac number, because 553534021 - 2³ = 553534013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (553534921) 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, 276767010 + 276767011.

It is an arithmetic number, because the mean of its divisors is an integer number (276767011).

Almost surely, 2^553534021 is an apocalyptic number.

It is an amenable number.

553534021 is a deficient number, since it is larger than the sum of its proper divisors (1).

553534021 is an equidigital number, since it uses as much as digits as its factorization.

553534021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 553534021 is about 23527.3037341723. The cubic root of 553534021 is about 821.0723729955.

Adding to 553534021 its reverse (120435355), we get a palindrome (673969376).

The spelling of 553534021 in words is "five hundred fifty-three million, five hundred thirty-four thousand, twenty-one".