555022421 has 2 divisors, whose sum is σ = 555022422. Its totient is φ = 555022420.

The previous prime is 555022399. The next prime is 555022493. The reversal of 555022421 is 124220555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502387396 + 52635025 = 22414^2 + 7255^2 .

It is a cyclic number.

It is not a de Polignac number, because 555022421 - 2¹⁴ = 555006037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555022021) 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, 277511210 + 277511211.

It is an arithmetic number, because the mean of its divisors is an integer number (277511211).

Almost surely, 2^555022421 is an apocalyptic number.

It is an amenable number.

555022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

555022421 is an equidigital number, since it uses as much as digits as its factorization.

555022421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 555022421 is about 23558.9138331970. The cubic root of 555022421 is about 821.8076427057.

Adding to 555022421 its reverse (124220555), we get a palindrome (679242976).

The spelling of 555022421 in words is "five hundred fifty-five million, twenty-two thousand, four hundred twenty-one".