51351143 has 4 divisors (see below), whose sum is σ = 51387120. Its totient is φ = 51315168.

The previous prime is 51351137. The next prime is 51351149. The reversal of 51351143 is 34115315.

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

It is an interprime number because it is at equal distance from previous prime (51351137) and next prime (51351149).

It is a cyclic number.

It is not a de Polignac number, because 51351143 - 2²⁴ = 34573927 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51351149) 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, 15755 + ... + 18732.

It is an arithmetic number, because the mean of its divisors is an integer number (12846780).

Almost surely, 2^51351143 is an apocalyptic number.

51351143 is a deficient number, since it is larger than the sum of its proper divisors (35977).

51351143 is a wasteful number, since it uses less digits than its factorization.

51351143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35976.

The product of its digits is 900, while the sum is 23.

The square root of 51351143 is about 7165.9711833080. The cubic root of 51351143 is about 371.6921350584.

Adding to 51351143 its reverse (34115315), we get a palindrome (85466458).

The spelling of 51351143 in words is "fifty-one million, three hundred fifty-one thousand, one hundred forty-three".