55544987 has 4 divisors (see below), whose sum is σ = 55577280. Its totient is φ = 55512696.

The previous prime is 55544971. The next prime is 55545031. The reversal of 55544987 is 78944555.

It is a happy number.

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 55544987 - 2⁴ = 55544971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55544927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13412 + ... + 17057.

It is an arithmetic number, because the mean of its divisors is an integer number (13894320).

Almost surely, 2^55544987 is an apocalyptic number.

55544987 is a deficient number, since it is larger than the sum of its proper divisors (32293).

55544987 is a wasteful number, since it uses less digits than its factorization.

55544987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32292.

The product of its digits is 1008000, while the sum is 47.

The square root of 55544987 is about 7452.8509310196. The cubic root of 55544987 is about 381.5472166978.

The spelling of 55544987 in words is "fifty-five million, five hundred forty-four thousand, nine hundred eighty-seven".