555219961 has 2 divisors, whose sum is σ = 555219962. Its totient is φ = 555219960.

The previous prime is 555219953. The next prime is 555219967. The reversal of 555219961 is 169912555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 513294336 + 41925625 = 22656^2 + 6475^2 .

It is a cyclic number.

It is not a de Polignac number, because 555219961 - 2³ = 555219953 is a prime.

It is not a weakly prime, because it can be changed into another prime (555219967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277609980 + 277609981.

It is an arithmetic number, because the mean of its divisors is an integer number (277609981).

Almost surely, 2^555219961 is an apocalyptic number.

It is an amenable number.

555219961 is a deficient number, since it is larger than the sum of its proper divisors (1).

555219961 is an equidigital number, since it uses as much as digits as its factorization.

555219961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 43.

The square root of 555219961 is about 23563.1059285486. The cubic root of 555219961 is about 821.9051286328.

The spelling of 555219961 in words is "five hundred fifty-five million, two hundred nineteen thousand, nine hundred sixty-one".