51205830 has 32 divisors (see below), whose sum is σ = 132348384. Its totient is φ = 12604416.

The previous prime is 51205829. The next prime is 51205841. The reversal of 51205830 is 3850215.

51205830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51205830.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 65259 + ... + 66038.

It is an arithmetic number, because the mean of its divisors is an integer number (4135887).

Almost surely, 2^51205830 is an apocalyptic number.

51205830 is an abundant number, since it is smaller than the sum of its proper divisors (81142554).

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

51205830 is a wasteful number, since it uses less digits than its factorization.

51205830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131320.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51205830 is about 7155.8249000377. The cubic root of 51205830 is about 371.3412001452.

The spelling of 51205830 in words is "fifty-one million, two hundred five thousand, eight hundred thirty".