5531987 has 4 divisors (see below), whose sum is σ = 5857416. Its totient is φ = 5206560.

The previous prime is 5531927. The next prime is 5532019. The reversal of 5531987 is 7891355.

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 5531987 - 2¹⁰ = 5530963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5531987.

It is not an unprimeable number, because it can be changed into a prime (5531927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162689 + ... + 162722.

It is an arithmetic number, because the mean of its divisors is an integer number (1464354).

Almost surely, 2^5531987 is an apocalyptic number.

5531987 is a deficient number, since it is larger than the sum of its proper divisors (325429).

5531987 is a wasteful number, since it uses less digits than its factorization.

5531987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325428.

The product of its digits is 37800, while the sum is 38.

The square root of 5531987 is about 2352.0176444916. The cubic root of 5531987 is about 176.8589532488.

It can be divided in two parts, 55319 and 87, that multiplied together give a triangular number (4812753 = T₃₁₀₂).

The spelling of 5531987 in words is "five million, five hundred thirty-one thousand, nine hundred eighty-seven".