5511999 has 12 divisors (see below), whose sum is σ = 7539848. Its totient is φ = 3581760.

The previous prime is 5511997. The next prime is 5512007. The reversal of 5511999 is 9991155.

It is not a de Polignac number, because 5511999 - 2¹ = 5511997 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4497 + ... + 5589.

Almost surely, 2^5511999 is an apocalyptic number.

5511999 is a deficient number, since it is larger than the sum of its proper divisors (2027849).

5511999 is a wasteful number, since it uses less digits than its factorization.

5511999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1137 counting only the distinct ones).

The product of its digits is 18225, while the sum is 39.

The square root of 5511999 is about 2347.7646815641. The cubic root of 5511999 is about 176.6456891353.

The spelling of 5511999 in words is "five million, five hundred eleven thousand, nine hundred ninety-nine".