51813705 has 32 divisors (see below), whose sum is σ = 89244288. Its totient is φ = 25574400.

The previous prime is 51813683. The next prime is 51813731. The reversal of 51813705 is 50731815.

51813705 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 51813705 - 2⁷ = 51813577 is a prime.

It is an unprimeable number.

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, 13890 + ... + 17220.

It is an arithmetic number, because the mean of its divisors is an integer number (2788884).

Almost surely, 2^51813705 is an apocalyptic number.

It is an amenable number.

51813705 is a deficient number, since it is larger than the sum of its proper divisors (37430583).

51813705 is a wasteful number, since it uses less digits than its factorization.

51813705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 51813705 is about 7198.1737267171. The cubic root of 51813705 is about 372.8048463186.

The spelling of 51813705 in words is "fifty-one million, eight hundred thirteen thousand, seven hundred five".