55685159 has 2 divisors, whose sum is σ = 55685160. Its totient is φ = 55685158.

The previous prime is 55685153. The next prime is 55685173. The reversal of 55685159 is 95158655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55685159 - 2¹² = 55681063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55685153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27842579 + 27842580.

It is an arithmetic number, because the mean of its divisors is an integer number (27842580).

Almost surely, 2^55685159 is an apocalyptic number.

55685159 is a deficient number, since it is larger than the sum of its proper divisors (1).

55685159 is an equidigital number, since it uses as much as digits as its factorization.

55685159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 44.

The square root of 55685159 is about 7462.2489237495. The cubic root of 55685159 is about 381.8679015666.

The spelling of 55685159 in words is "fifty-five million, six hundred eighty-five thousand, one hundred fifty-nine".