55051111 has 2 divisors, whose sum is σ = 55051112. Its totient is φ = 55051110.

The previous prime is 55051093. The next prime is 55051123. The reversal of 55051111 is 11115055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55051111 - 2¹³ = 55042919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55052111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27525555 + 27525556.

It is an arithmetic number, because the mean of its divisors is an integer number (27525556).

Almost surely, 2^55051111 is an apocalyptic number.

55051111 is a deficient number, since it is larger than the sum of its proper divisors (1).

55051111 is an equidigital number, since it uses as much as digits as its factorization.

55051111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 55051111 is about 7419.6435898229. The cubic root of 55051111 is about 380.4130112426.

Adding to 55051111 its reverse (11115055), we get a palindrome (66166166).

The spelling of 55051111 in words is "fifty-five million, fifty-one thousand, one hundred eleven".