55571686 has 4 divisors (see below), whose sum is σ = 83357532. Its totient is φ = 27785842.

The previous prime is 55571683. The next prime is 55571699. The reversal of 55571686 is 68617555.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55571683) 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 as a sum of consecutive naturals, namely, 13892920 + ... + 13892923.

It is an arithmetic number, because the mean of its divisors is an integer number (20839383).

Almost surely, 2^55571686 is an apocalyptic number.

55571686 is a deficient number, since it is larger than the sum of its proper divisors (27785846).

55571686 is a wasteful number, since it uses less digits than its factorization.

55571686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27785845.

The product of its digits is 252000, while the sum is 43.

The square root of 55571686 is about 7454.6419095755. The cubic root of 55571686 is about 381.6083401099.

The spelling of 55571686 in words is "fifty-five million, five hundred seventy-one thousand, six hundred eighty-six".