51820794 has 96 divisors (see below), whose sum is σ = 128044800. Its totient is φ = 15054336.

The previous prime is 51820793. The next prime is 51820819. The reversal of 51820794 is 49702815.

It is not an unprimeable number, because it can be changed into a prime (51820793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260307 + ... + 260505.

It is an arithmetic number, because the mean of its divisors is an integer number (1333800).

Almost surely, 2^51820794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51820794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64022400).

51820794 is an abundant number, since it is smaller than the sum of its proper divisors (76224006).

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

51820794 is a wasteful number, since it uses less digits than its factorization.

51820794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51820794 is about 7198.6661264431. Note that the first 3 decimals coincide. The cubic root of 51820794 is about 372.8218475671.

It can be divided in two parts, 518 and 20794, that added together give a palindrome (21312).

The spelling of 51820794 in words is "fifty-one million, eight hundred twenty thousand, seven hundred ninety-four".