51033870 has 48 divisors (see below), whose sum is σ = 133688880. Its totient is φ = 13506432.

The previous prime is 51033839. The next prime is 51033883. The reversal of 51033870 is 7833015.

51033870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 10261 + ... + 14399.

It is an arithmetic number, because the mean of its divisors is an integer number (2785185).

Almost surely, 2^51033870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51033870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66844440).

51033870 is an abundant number, since it is smaller than the sum of its proper divisors (82655010).

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

51033870 is a wasteful number, since it uses less digits than its factorization.

51033870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289 (or 4286 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51033870 is about 7143.7994092780. The cubic root of 51033870 is about 370.9250532150.

Adding to 51033870 its reverse (7833015), we get a palindrome (58866885).

The spelling of 51033870 in words is "fifty-one million, thirty-three thousand, eight hundred seventy".