51315143 has 8 divisors (see below), whose sum is σ = 58926720. Its totient is φ = 44194680.

The previous prime is 51315113. The next prime is 51315157. The reversal of 51315143 is 34151315.

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 51315143 - 2¹⁰ = 51314119 is a prime.

It is a super-2 number, since 2×51315143² = 5266487802220898, which contains 22 as substring.

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 (51315113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122555 + ... + 122972.

It is an arithmetic number, because the mean of its divisors is an integer number (7365840).

Almost surely, 2^51315143 is an apocalyptic number.

51315143 is a deficient number, since it is larger than the sum of its proper divisors (7611577).

51315143 is a wasteful number, since it uses less digits than its factorization.

51315143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245557.

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

The square root of 51315143 is about 7163.4588712437. The cubic root of 51315143 is about 371.6052558173.

Adding to 51315143 its reverse (34151315), we get a palindrome (85466458).

The spelling of 51315143 in words is "fifty-one million, three hundred fifteen thousand, one hundred forty-three".