555344401 has 2 divisors, whose sum is σ = 555344402. Its totient is φ = 555344400.

The previous prime is 555344399. The next prime is 555344411. The reversal of 555344401 is 104443555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304153600 + 251190801 = 17440^2 + 15849^2 .

It is a cyclic number.

It is not a de Polignac number, because 555344401 - 2¹ = 555344399 is a prime.

Together with 555344399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (555344411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277672200 + 277672201.

It is an arithmetic number, because the mean of its divisors is an integer number (277672201).

Almost surely, 2^555344401 is an apocalyptic number.

It is an amenable number.

555344401 is a deficient number, since it is larger than the sum of its proper divisors (1).

555344401 is an equidigital number, since it uses as much as digits as its factorization.

555344401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 555344401 is about 23565.7463493096. The cubic root of 555344401 is about 821.9665278627.

Adding to 555344401 its reverse (104443555), we get a palindrome (659787956).

The spelling of 555344401 in words is "five hundred fifty-five million, three hundred forty-four thousand, four hundred one".