55144871 has 2 divisors, whose sum is σ = 55144872. Its totient is φ = 55144870.

The previous prime is 55144847. The next prime is 55144891. The reversal of 55144871 is 17844155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55144871 - 2⁶ = 55144807 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55144841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27572435 + 27572436.

It is an arithmetic number, because the mean of its divisors is an integer number (27572436).

Almost surely, 2^55144871 is an apocalyptic number.

55144871 is a deficient number, since it is larger than the sum of its proper divisors (1).

55144871 is an equidigital number, since it uses as much as digits as its factorization.

55144871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 55144871 is about 7425.9592646338. The cubic root of 55144871 is about 380.6288548677.

The spelling of 55144871 in words is "fifty-five million, one hundred forty-four thousand, eight hundred seventy-one".