51820650 has 72 divisors (see below), whose sum is σ = 159123744. Its totient is φ = 11844000.

The previous prime is 51820627. The next prime is 51820667. The reversal of 51820650 is 5602815.

51820650 is a `hidden beast` number, since 5 + 1 + 8 + 2 + 0 + 650 = 666.

51820650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 35 ways as a sum of consecutive naturals, for example, 5076 + ... + 11375.

It is an arithmetic number, because the mean of its divisors is an integer number (2210052).

Almost surely, 2^51820650 is an apocalyptic number.

51820650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51820650 is an abundant number, since it is smaller than the sum of its proper divisors (107303094).

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

51820650 is a wasteful number, since it uses less digits than its factorization.

51820650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16476 (or 16468 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51820650 is about 7198.6561245833. The cubic root of 51820650 is about 372.8215022335.

The spelling of 51820650 in words is "fifty-one million, eight hundred twenty thousand, six hundred fifty".