51742815 has 32 divisors (see below), whose sum is σ = 90694080. Its totient is φ = 25073664.

The previous prime is 51742777. The next prime is 51742819. The reversal of 51742815 is 51824715.

51742815 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 51742815 - 2⁹ = 51742303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742819) 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 31 ways as a sum of consecutive naturals, for example, 3897 + ... + 10893.

It is an arithmetic number, because the mean of its divisors is an integer number (2834190).

Almost surely, 2^51742815 is an apocalyptic number.

51742815 is a deficient number, since it is larger than the sum of its proper divisors (38951265).

51742815 is a wasteful number, since it uses less digits than its factorization.

51742815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051.

The product of its digits is 11200, while the sum is 33.

The square root of 51742815 is about 7193.2478756122. The cubic root of 51742815 is about 372.6347484814.

The spelling of 51742815 in words is "fifty-one million, seven hundred forty-two thousand, eight hundred fifteen".