51870730 has 16 divisors (see below), whose sum is σ = 94762080. Its totient is φ = 20438352.

The previous prime is 51870677. The next prime is 51870733. The reversal of 51870730 is 3707815.

51870730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51870692 and 51870701.

It is not an unprimeable number, because it can be changed into a prime (51870733) 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, 38040 + ... + 39379.

It is an arithmetic number, because the mean of its divisors is an integer number (5922630).

Almost surely, 2^51870730 is an apocalyptic number.

51870730 is a deficient number, since it is larger than the sum of its proper divisors (42891350).

51870730 is a wasteful number, since it uses less digits than its factorization.

51870730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77493.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 51870730 is about 7202.1337116163. The cubic root of 51870730 is about 372.9415630553.

The spelling of 51870730 in words is "fifty-one million, eight hundred seventy thousand, seven hundred thirty".