55540159 has 2 divisors, whose sum is σ = 55540160. Its totient is φ = 55540158.

The previous prime is 55540123. The next prime is 55540171. The reversal of 55540159 is 95104555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55540159 - 2⁹ = 55539647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55540109) 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, 27770079 + 27770080.

It is an arithmetic number, because the mean of its divisors is an integer number (27770080).

Almost surely, 2^55540159 is an apocalyptic number.

55540159 is a deficient number, since it is larger than the sum of its proper divisors (1).

55540159 is an equidigital number, since it uses as much as digits as its factorization.

55540159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 55540159 is about 7452.5270210849. The cubic root of 55540159 is about 381.5361616148.

The spelling of 55540159 in words is "fifty-five million, five hundred forty thousand, one hundred fifty-nine".