11400055 has 4 divisors (see below), whose sum is σ = 13680072. Its totient is φ = 9120040.

The previous prime is 11400043. The next prime is 11400071. The reversal of 11400055 is 55000411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55000411 = 281 ⋅195731.

It is a de Polignac number, because none of the positive numbers 2^k-11400055 is a prime.

It is a super-2 number, since 2×11400055² = 259922508006050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140001 + ... + 1140010.

It is an arithmetic number, because the mean of its divisors is an integer number (3420018).

Almost surely, 2^11400055 is an apocalyptic number.

11400055 is a deficient number, since it is larger than the sum of its proper divisors (2280017).

11400055 is an equidigital number, since it uses as much as digits as its factorization.

11400055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280016.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 11400055 is about 3376.3967480141. The cubic root of 11400055 is about 225.0620734085.

Adding to 11400055 its reverse (55000411), we get a palindrome (66400466).

The spelling of 11400055 in words is "eleven million, four hundred thousand, fifty-five".