5551555 has 4 divisors (see below), whose sum is σ = 6661872. Its totient is φ = 4441240.

The previous prime is 5551531. The next prime is 5551583.

5551555 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5551555 - 2¹⁷ = 5420483 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555151 + ... + 555160.

It is an arithmetic number, because the mean of its divisors is an integer number (1665468).

Almost surely, 2^5551555 is an apocalyptic number.

5551555 is a deficient number, since it is larger than the sum of its proper divisors (1110317).

5551555 is a wasteful number, since it uses less digits than its factorization.

5551555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110316.

The product of its digits is 15625, while the sum is 31.

The square root of 5551555 is about 2356.1738051341. The cubic root of 5551555 is about 177.0672390756.

The spelling of 5551555 in words is "five million, five hundred fifty-one thousand, five hundred fifty-five".