553721323 has 2 divisors, whose sum is σ = 553721324. Its totient is φ = 553721322.

The previous prime is 553721321. The next prime is 553721383. The reversal of 553721323 is 323127355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 553721323 - 2¹ = 553721321 is a prime.

Together with 553721321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (553721321) 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, 276860661 + 276860662.

It is an arithmetic number, because the mean of its divisors is an integer number (276860662).

Almost surely, 2^553721323 is an apocalyptic number.

553721323 is a deficient number, since it is larger than the sum of its proper divisors (1).

553721323 is an equidigital number, since it uses as much as digits as its factorization.

553721323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 31.

The square root of 553721323 is about 23531.2839216223. The cubic root of 553721323 is about 821.1649726365.

Adding to 553721323 its reverse (323127355), we get a palindrome (876848678).

The spelling of 553721323 in words is "five hundred fifty-three million, seven hundred twenty-one thousand, three hundred twenty-three".