55444111 has 2 divisors, whose sum is σ = 55444112. Its totient is φ = 55444110.

The previous prime is 55444091. The next prime is 55444139. The reversal of 55444111 is 11144455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55444111 - 2⁹ = 55443599 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 a weakly prime, because it can be changed into another prime (55444141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722055 + 27722056.

It is an arithmetic number, because the mean of its divisors is an integer number (27722056).

Almost surely, 2^55444111 is an apocalyptic number.

55444111 is a deficient number, since it is larger than the sum of its proper divisors (1).

55444111 is an equidigital number, since it uses as much as digits as its factorization.

55444111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1600, while the sum is 25.

The square root of 55444111 is about 7446.0802439942. The cubic root of 55444111 is about 381.3160990474.

Adding to 55444111 its reverse (11144455), we get a palindrome (66588566).

It can be divided in two parts, 55444 and 111, that added together give a palindrome (55555).

The spelling of 55444111 in words is "fifty-five million, four hundred forty-four thousand, one hundred eleven".