55318587 has 8 divisors (see below), whose sum is σ = 74647104. Its totient is φ = 36434568.

The previous prime is 55318559. The next prime is 55318603. The reversal of 55318587 is 78581355.

It is a happy number.

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

It is not a de Polignac number, because 55318587 - 2⁸ = 55318331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55318507) 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, 110833 + ... + 111330.

It is an arithmetic number, because the mean of its divisors is an integer number (9330888).

Almost surely, 2^55318587 is an apocalyptic number.

55318587 is a deficient number, since it is larger than the sum of its proper divisors (19328517).

55318587 is a wasteful number, since it uses less digits than its factorization.

55318587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222249.

The product of its digits is 168000, while the sum is 42.

The square root of 55318587 is about 7437.6466035971. The cubic root of 55318587 is about 381.0281184254.

The spelling of 55318587 in words is "fifty-five million, three hundred eighteen thousand, five hundred eighty-seven".