51715740 has 24 divisors (see below), whose sum is σ = 144804240. Its totient is φ = 13790848.

The previous prime is 51715709. The next prime is 51715747. The reversal of 51715740 is 4751715.

51715740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51715698 and 51715707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51715747) 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 7 ways as a sum of consecutive naturals, for example, 430905 + ... + 431024.

It is an arithmetic number, because the mean of its divisors is an integer number (6033510).

Almost surely, 2^51715740 is an apocalyptic number.

It is an amenable number.

51715740 is an abundant number, since it is smaller than the sum of its proper divisors (93088500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51715740 is a wasteful number, since it uses less digits than its factorization.

51715740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861941 (or 861939 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 51715740 is about 7191.3656561185. The cubic root of 51715740 is about 372.5697420577.

The spelling of 51715740 in words is "fifty-one million, seven hundred fifteen thousand, seven hundred forty".