51457143 has 4 divisors (see below), whose sum is σ = 68609528. Its totient is φ = 34304760.

The previous prime is 51457123. The next prime is 51457157. The reversal of 51457143 is 34175415.

51457143 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 51457143 - 2⁹ = 51456631 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 51457143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51457123) 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, 8576188 + ... + 8576193.

It is an arithmetic number, because the mean of its divisors is an integer number (17152382).

Almost surely, 2^51457143 is an apocalyptic number.

51457143 is a deficient number, since it is larger than the sum of its proper divisors (17152385).

51457143 is a wasteful number, since it uses less digits than its factorization.

51457143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17152384.

The product of its digits is 8400, while the sum is 30.

The square root of 51457143 is about 7173.3634370496. The cubic root of 51457143 is about 371.9477105947.

The spelling of 51457143 in words is "fifty-one million, four hundred fifty-seven thousand, one hundred forty-three".