51291143 has 8 divisors (see below), whose sum is σ = 53053056. Its totient is φ = 49536000.

The previous prime is 51291103. The next prime is 51291223. The reversal of 51291143 is 34119215.

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 51291143 - 2¹⁰ = 51290119 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 (51291103) 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, 17255 + ... + 20007.

It is an arithmetic number, because the mean of its divisors is an integer number (6631632).

Almost surely, 2^51291143 is an apocalyptic number.

51291143 is a deficient number, since it is larger than the sum of its proper divisors (1761913).

51291143 is a wasteful number, since it uses less digits than its factorization.

51291143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385.

The product of its digits is 1080, while the sum is 26.

The square root of 51291143 is about 7161.7835069206. The cubic root of 51291143 is about 371.5473137469.

The spelling of 51291143 in words is "fifty-one million, two hundred ninety-one thousand, one hundred forty-three".