5515554 has 32 divisors (see below), whose sum is σ = 12124224. Its totient is φ = 1658880.

The previous prime is 5515541. The next prime is 5515579. The reversal of 5515554 is 4555155.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12522 + ... + 12954.

It is an arithmetic number, because the mean of its divisors is an integer number (378882).

Almost surely, 2^5515554 is an apocalyptic number.

5515554 is an abundant number, since it is smaller than the sum of its proper divisors (6608670).

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

5515554 is a wasteful number, since it uses less digits than its factorization.

5515554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642.

The product of its digits is 12500, while the sum is 30.

The square root of 5515554 is about 2348.5216626636. The cubic root of 5515554 is about 176.6836572402.

It can be divided in two parts, 551 and 5554, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 5515554 in words is "five million, five hundred fifteen thousand, five hundred fifty-four".