55885687 has 8 divisors (see below), whose sum is σ = 65656080. Its totient is φ = 46896960.

The previous prime is 55885603. The next prime is 55885723. The reversal of 55885687 is 78658855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55885687 - 2⁷ = 55885559 is a prime.

It is a super-2 number, since 2×55885687² = 6246420022923938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55885787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195262 + ... + 195547.

It is an arithmetic number, because the mean of its divisors is an integer number (8207010).

Almost surely, 2^55885687 is an apocalyptic number.

55885687 is a deficient number, since it is larger than the sum of its proper divisors (9770393).

55885687 is a wasteful number, since it uses less digits than its factorization.

55885687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390833.

The product of its digits is 2688000, while the sum is 52.

The square root of 55885687 is about 7475.6730131808. The cubic root of 55885687 is about 382.3257343356.

The spelling of 55885687 in words is "fifty-five million, eight hundred eighty-five thousand, six hundred eighty-seven".