51720682 has 16 divisors (see below), whose sum is σ = 83725992. Its totient is φ = 23820480.

The previous prime is 51720677. The next prime is 51720689. The reversal of 51720682 is 28602715.

51720682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 40691641 + 11029041 = 6379^2 + 3321^2 .

It is not an unprimeable number, because it can be changed into a prime (51720689) 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, 12228 + ... + 15904.

Almost surely, 2^51720682 is an apocalyptic number.

51720682 is a deficient number, since it is larger than the sum of its proper divisors (32005310).

51720682 is a wasteful number, since it uses less digits than its factorization.

51720682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 51720682 is about 7191.7092544123. The cubic root of 51720682 is about 372.5816093733.

The spelling of 51720682 in words is "fifty-one million, seven hundred twenty thousand, six hundred eighty-two".