51920143 has 8 divisors (see below), whose sum is σ = 57358080. Its totient is φ = 46601880.

The previous prime is 51920119. The next prime is 51920149. The reversal of 51920143 is 34102915.

51920143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51920143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51920149) 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 7 ways as a sum of consecutive naturals, for example, 29005 + ... + 30742.

It is an arithmetic number, because the mean of its divisors is an integer number (7169760).

Almost surely, 2^51920143 is an apocalyptic number.

51920143 is a deficient number, since it is larger than the sum of its proper divisors (5437937).

51920143 is a wasteful number, since it uses less digits than its factorization.

51920143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59837.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 51920143 is about 7205.5633367558. The cubic root of 51920143 is about 373.0599491077.

The spelling of 51920143 in words is "fifty-one million, nine hundred twenty thousand, one hundred forty-three".