5555111 has 4 divisors (see below), whose sum is σ = 5633424. Its totient is φ = 5476800.

The previous prime is 5555083. The next prime is 5555117. The reversal of 5555111 is 1115555.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 5555111 - 2⁶ = 5555047 is a prime.

It is a nialpdrome in base 10.

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 (5555117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39050 + ... + 39191.

It is an arithmetic number, because the mean of its divisors is an integer number (1408356).

Almost surely, 2^5555111 is an apocalyptic number.

5555111 is a deficient number, since it is larger than the sum of its proper divisors (78313).

5555111 is an equidigital number, since it uses as much as digits as its factorization.

5555111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78312.

The product of its digits is 625, while the sum is 23.

The square root of 5555111 is about 2356.9282975941. The cubic root of 5555111 is about 177.1050372967.

It can be divided in two parts, 5555 and 111, that multiplied together give a triangular number (616605 = T₁₁₁₀).

The spelling of 5555111 in words is "five million, five hundred fifty-five thousand, one hundred eleven".