55839143 has 4 divisors (see below), whose sum is σ = 56265528. Its totient is φ = 55412760.

The previous prime is 55839137. The next prime is 55839151. The reversal of 55839143 is 34193855.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55839143 - 2⁶ = 55839079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55839097 and 55839106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55832143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212996 + ... + 213257.

It is an arithmetic number, because the mean of its divisors is an integer number (14066382).

Almost surely, 2^55839143 is an apocalyptic number.

55839143 is a deficient number, since it is larger than the sum of its proper divisors (426385).

55839143 is a wasteful number, since it uses less digits than its factorization.

55839143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426384.

The product of its digits is 64800, while the sum is 38.

The square root of 55839143 is about 7472.5593339899. The cubic root of 55839143 is about 382.2195657597.

The spelling of 55839143 in words is "fifty-five million, eight hundred thirty-nine thousand, one hundred forty-three".