55111719 has 16 divisors (see below), whose sum is σ = 79409792. Its totient is φ = 33797088.

The previous prime is 55111717. The next prime is 55111733. The reversal of 55111719 is 91711155.

It is not a de Polignac number, because 55111719 - 2¹ = 55111717 is a prime.

It is a super-2 number, since 2×55111719² = 6074603142269922, which contains 22 as substring.

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 a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9672 + ... + 14274.

It is an arithmetic number, because the mean of its divisors is an integer number (4963112).

Almost surely, 2^55111719 is an apocalyptic number.

55111719 is a deficient number, since it is larger than the sum of its proper divisors (24298073).

55111719 is a wasteful number, since it uses less digits than its factorization.

55111719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926.

The product of its digits is 1575, while the sum is 30.

The square root of 55111719 is about 7423.7267595191. The cubic root of 55111719 is about 380.5525640777.

The spelling of 55111719 in words is "fifty-five million, one hundred eleven thousand, seven hundred nineteen".