55111054231 has 2 divisors, whose sum is σ = 55111054232. Its totient is φ = 55111054230.

The previous prime is 55111054213. The next prime is 55111054279. The reversal of 55111054231 is 13245011155.

Together with previous prime (55111054213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55111054231 - 2²³ = 55102665623 is a prime.

It is a super-2 number, since 2×55111054231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55111054231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55111054931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555527115 + 27555527116.

It is an arithmetic number, because the mean of its divisors is an integer number (27555527116).

Almost surely, 2^55111054231 is an apocalyptic number.

55111054231 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111054231 is an equidigital number, since it uses as much as digits as its factorization.

55111054231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 55111054231 its reverse (13245011155), we get a palindrome (68356065386).

The spelling of 55111054231 in words is "fifty-five billion, one hundred eleven million, fifty-four thousand, two hundred thirty-one".