51315043 has 4 divisors (see below), whose sum is σ = 55262368. Its totient is φ = 47367720.

The previous prime is 51315031. The next prime is 51315053. The reversal of 51315043 is 34051315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34051315 = 5 ⋅6810263.

It is a cyclic number.

It is not a de Polignac number, because 51315043 - 2⁹ = 51314531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51315053) 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 3 ways as a sum of consecutive naturals, for example, 1973643 + ... + 1973668.

It is an arithmetic number, because the mean of its divisors is an integer number (13815592).

Almost surely, 2^51315043 is an apocalyptic number.

51315043 is a deficient number, since it is larger than the sum of its proper divisors (3947325).

51315043 is a wasteful number, since it uses less digits than its factorization.

51315043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947324.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51315043 is about 7163.4518913719. The cubic root of 51315043 is about 371.6050144295.

Adding to 51315043 its reverse (34051315), we get a palindrome (85366358).

The spelling of 51315043 in words is "fifty-one million, three hundred fifteen thousand, forty-three".