5515987 has 4 divisors (see below), whose sum is σ = 5529160. Its totient is φ = 5502816.

The previous prime is 5515981. The next prime is 5516009. The reversal of 5515987 is 7895155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895155 = 5 ⋅1579031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5515987 is a prime.

It is a super-2 number, since 2×5515987² = 60852225168338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5515981) 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, 5937 + ... + 6802.

It is an arithmetic number, because the mean of its divisors is an integer number (1382290).

Almost surely, 2^5515987 is an apocalyptic number.

5515987 is a deficient number, since it is larger than the sum of its proper divisors (13173).

5515987 is a wasteful number, since it uses less digits than its factorization.

5515987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13172.

The product of its digits is 63000, while the sum is 40.

The square root of 5515987 is about 2348.6138465061. The cubic root of 5515987 is about 176.6882806513.

The spelling of 5515987 in words is "five million, five hundred fifteen thousand, nine hundred eighty-seven".