55445111 has 4 divisors (see below), whose sum is σ = 57855792. Its totient is φ = 53034432.

The previous prime is 55445099. The next prime is 55445119. The reversal of 55445111 is 11154455.

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 55445111 - 2²² = 51250807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55445119) 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, 1205306 + ... + 1205351.

It is an arithmetic number, because the mean of its divisors is an integer number (14463948).

Almost surely, 2^55445111 is an apocalyptic number.

55445111 is a deficient number, since it is larger than the sum of its proper divisors (2410681).

55445111 is a wasteful number, since it uses less digits than its factorization.

55445111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410680.

The product of its digits is 2000, while the sum is 26.

The square root of 55445111 is about 7446.1473931154. The cubic root of 55445111 is about 381.3183915289.

Adding to 55445111 its reverse (11154455), we get a palindrome (66599566).

The spelling of 55445111 in words is "fifty-five million, four hundred forty-five thousand, one hundred eleven".