555221879 has 2 divisors, whose sum is σ = 555221880. Its totient is φ = 555221878.

The previous prime is 555221869. The next prime is 555221893. The reversal of 555221879 is 978122555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555221879 - 2²⁴ = 538444663 is a prime.

It is a Sophie Germain 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 (555221839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277610939 + 277610940.

It is an arithmetic number, because the mean of its divisors is an integer number (277610940).

Almost surely, 2^555221879 is an apocalyptic number.

555221879 is a deficient number, since it is larger than the sum of its proper divisors (1).

555221879 is an equidigital number, since it uses as much as digits as its factorization.

555221879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252000, while the sum is 44.

The square root of 555221879 is about 23563.1466277320. The cubic root of 555221879 is about 821.9060750519.

The spelling of 555221879 in words is "five hundred fifty-five million, two hundred twenty-one thousand, eight hundred seventy-nine".