51015243 has 16 divisors (see below), whose sum is σ = 71853056. Its totient is φ = 32145120.

The previous prime is 51015241. The next prime is 51015253. The reversal of 51015243 is 34251015.

51015243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51015243 - 2¹ = 51015241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51015241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2380 + ... + 10377.

It is an arithmetic number, because the mean of its divisors is an integer number (4490816).

Almost surely, 2^51015243 is an apocalyptic number.

51015243 is a deficient number, since it is larger than the sum of its proper divisors (20837813).

51015243 is a wasteful number, since it uses less digits than its factorization.

51015243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51015243 is about 7142.4955722772. The cubic root of 51015243 is about 370.8799193869.

Adding to 51015243 its reverse (34251015), we get a palindrome (85266258).

It can be divided in two parts, 510 and 15243, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 51015243 in words is "fifty-one million, fifteen thousand, two hundred forty-three".