55550431111 has 16 divisors (see below), whose sum is σ = 65255996736. Its totient is φ = 46289442816.

The previous prime is 55550431067. The next prime is 55550431141. The reversal of 55550431111 is 11113405555.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55550431111 - 2¹⁹ = 55549906823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550431141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227085 + ... + 403321.

It is an arithmetic number, because the mean of its divisors is an integer number (4078499796).

Almost surely, 2^55550431111 is an apocalyptic number.

55550431111 is a deficient number, since it is larger than the sum of its proper divisors (9705565625).

55550431111 is a wasteful number, since it uses less digits than its factorization.

55550431111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177498.

The product of its (nonzero) digits is 7500, while the sum is 31.

Adding to 55550431111 its reverse (11113405555), we get a palindrome (66663836666).

The spelling of 55550431111 in words is "fifty-five billion, five hundred fifty million, four hundred thirty-one thousand, one hundred eleven".