55555163 has 2 divisors, whose sum is σ = 55555164. Its totient is φ = 55555162.

The previous prime is 55555147. The next prime is 55555169. The reversal of 55555163 is 36155555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55555163 - 2⁴ = 55555147 is a prime.

It is a super-2 number, since 2×55555163² = 6172752271913138, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55555169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777581 + 27777582.

It is an arithmetic number, because the mean of its divisors is an integer number (27777582).

Almost surely, 2^55555163 is an apocalyptic number.

55555163 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555163 is an equidigital number, since it uses as much as digits as its factorization.

55555163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56250, while the sum is 35.

The square root of 55555163 is about 7453.5335915256. The cubic root of 55555163 is about 381.5705154545.

The spelling of 55555163 in words is "fifty-five million, five hundred fifty-five thousand, one hundred sixty-three".