55987167 has 8 divisors (see below), whose sum is σ = 78578560. Its totient is φ = 35360280.

The previous prime is 55987163. The next prime is 55987187. The reversal of 55987167 is 76178955.

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

It is not a de Polignac number, because 55987167 - 2² = 55987163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55987163) 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 7 ways as a sum of consecutive naturals, for example, 491059 + ... + 491172.

It is an arithmetic number, because the mean of its divisors is an integer number (9822320).

Almost surely, 2^55987167 is an apocalyptic number.

55987167 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55987167 is a deficient number, since it is larger than the sum of its proper divisors (22591393).

55987167 is a wasteful number, since it uses less digits than its factorization.

55987167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982253.

The product of its digits is 529200, while the sum is 48.

The square root of 55987167 is about 7482.4572835399. The cubic root of 55987167 is about 382.5570097434.

The spelling of 55987167 in words is "fifty-five million, nine hundred eighty-seven thousand, one hundred sixty-seven".