55571559 has 4 divisors (see below), whose sum is σ = 74095416. Its totient is φ = 37047704.

The previous prime is 55571557. The next prime is 55571567. The reversal of 55571559 is 95517555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55571559 - 2¹ = 55571557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55571559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9261924 + ... + 9261929.

It is an arithmetic number, because the mean of its divisors is an integer number (18523854).

Almost surely, 2^55571559 is an apocalyptic number.

55571559 is a deficient number, since it is larger than the sum of its proper divisors (18523857).

55571559 is a wasteful number, since it uses less digits than its factorization.

55571559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18523856.

The product of its digits is 196875, while the sum is 42.

The square root of 55571559 is about 7454.6333913882. The cubic root of 55571559 is about 381.6080494085.

The spelling of 55571559 in words is "fifty-five million, five hundred seventy-one thousand, five hundred fifty-nine".