55552111 has 2 divisors, whose sum is σ = 55552112. Its totient is φ = 55552110.

The previous prime is 55552103. The next prime is 55552157. The reversal of 55552111 is 11125555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55552111 - 2³ = 55552103 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55552411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27776055 + 27776056.

It is an arithmetic number, because the mean of its divisors is an integer number (27776056).

Almost surely, 2^55552111 is an apocalyptic number.

55552111 is a deficient number, since it is larger than the sum of its proper divisors (1).

55552111 is an equidigital number, since it uses as much as digits as its factorization.

55552111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1250, while the sum is 25.

The square root of 55552111 is about 7453.3288536063. The cubic root of 55552111 is about 381.5635279578.

Adding to 55552111 its reverse (11125555), we get a palindrome (66677666).

The spelling of 55552111 in words is "fifty-five million, five hundred fifty-two thousand, one hundred eleven".