5515998 has 16 divisors (see below), whose sum is σ = 11511936. Its totient is φ = 1758680.

The previous prime is 5515981. The next prime is 5516009. The reversal of 5515998 is 8995155.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19848 + ... + 20123.

It is an arithmetic number, because the mean of its divisors is an integer number (719496).

Almost surely, 2^5515998 is an apocalyptic number.

5515998 is an abundant number, since it is smaller than the sum of its proper divisors (5995938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5515998 is a wasteful number, since it uses less digits than its factorization.

5515998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39999.

The product of its digits is 81000, while the sum is 42.

The square root of 5515998 is about 2348.6161883117. The cubic root of 5515998 is about 176.6883981020.

The spelling of 5515998 in words is "five million, five hundred fifteen thousand, nine hundred ninety-eight".