55855143 has 8 divisors (see below), whose sum is σ = 82748400. Its totient is φ = 37236744.

The previous prime is 55855141. The next prime is 55855157. The reversal of 55855143 is 34155855.

It is a happy number.

It is not a de Polignac number, because 55855143 - 2¹ = 55855141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55855098 and 55855107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55855141) 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 in 7 ways as a sum of consecutive naturals, for example, 1034328 + ... + 1034381.

It is an arithmetic number, because the mean of its divisors is an integer number (10343550).

Almost surely, 2^55855143 is an apocalyptic number.

55855143 is a deficient number, since it is larger than the sum of its proper divisors (26893257).

55855143 is a wasteful number, since it uses less digits than its factorization.

55855143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068718 (or 2068712 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 55855143 is about 7473.6298409809. The cubic root of 55855143 is about 382.2560690004.

The spelling of 55855143 in words is "fifty-five million, eight hundred fifty-five thousand, one hundred forty-three".