51343143 has 4 divisors (see below), whose sum is σ = 68457528. Its totient is φ = 34228760.

The previous prime is 51343139. The next prime is 51343169. The reversal of 51343143 is 34134315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51343143 - 2² = 51343139 is a prime.

It is a super-2 number, since 2×51343143² = 5272236666236898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8557188 + ... + 8557193.

It is an arithmetic number, because the mean of its divisors is an integer number (17114382).

Almost surely, 2^51343143 is an apocalyptic number.

51343143 is a deficient number, since it is larger than the sum of its proper divisors (17114385).

51343143 is a wasteful number, since it uses less digits than its factorization.

51343143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17114384.

The product of its digits is 2160, while the sum is 24.

The square root of 51343143 is about 7165.4129678617. The cubic root of 51343143 is about 371.6728320703.

Adding to 51343143 its reverse (34134315), we get a palindrome (85477458).

The spelling of 51343143 in words is "fifty-one million, three hundred forty-three thousand, one hundred forty-three".