51655143 has 4 divisors (see below), whose sum is σ = 68873528. Its totient is φ = 34436760.

The previous prime is 51655111. The next prime is 51655147. The reversal of 51655143 is 34155615.

51655143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51655143 - 2⁵ = 51655111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51655143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51655147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609188 + ... + 8609193.

It is an arithmetic number, because the mean of its divisors is an integer number (17218382).

Almost surely, 2^51655143 is an apocalyptic number.

51655143 is a deficient number, since it is larger than the sum of its proper divisors (17218385).

51655143 is a wasteful number, since it uses less digits than its factorization.

51655143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17218384.

The product of its digits is 9000, while the sum is 30.

The square root of 51655143 is about 7187.1512437126. The cubic root of 51655143 is about 372.4241678585.

The spelling of 51655143 in words is "fifty-one million, six hundred fifty-five thousand, one hundred forty-three".