51143243 has 8 divisors (see below), whose sum is σ = 51744000. Its totient is φ = 50546088.

The previous prime is 51143233. The next prime is 51143291. The reversal of 51143243 is 34234115.

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

It is a cyclic number.

It is not a de Polignac number, because 51143243 - 2²² = 46948939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51143233) 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, 35858 + ... + 37256.

It is an arithmetic number, because the mean of its divisors is an integer number (6468000).

Almost surely, 2^51143243 is an apocalyptic number.

51143243 is a deficient number, since it is larger than the sum of its proper divisors (600757).

51143243 is a wasteful number, since it uses less digits than its factorization.

51143243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801.

The product of its digits is 1440, while the sum is 23.

The square root of 51143243 is about 7151.4504123290. The cubic root of 51143243 is about 371.1898462398.

Adding to 51143243 its reverse (34234115), we get a palindrome (85377358).

The spelling of 51143243 in words is "fifty-one million, one hundred forty-three thousand, two hundred forty-three".