51819950 has 72 divisors (see below), whose sum is σ = 120820392. Its totient is φ = 16390080.

The previous prime is 51819949. The next prime is 51819953. The reversal of 51819950 is 5991815.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51819953) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31037 + ... + 32663.

It is an arithmetic number, because the mean of its divisors is an integer number (1678061).

Almost surely, 2^51819950 is an apocalyptic number.

51819950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51819950 is an abundant number, since it is smaller than the sum of its proper divisors (69000442).

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

51819950 is a wasteful number, since it uses less digits than its factorization.

51819950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 51819950 is about 7198.6075042330. The cubic root of 51819950 is about 372.8198235190.

The spelling of 51819950 in words is "fifty-one million, eight hundred nineteen thousand, nine hundred fifty".