51900444 has 18 divisors (see below), whose sum is σ = 131192880. Its totient is φ = 17300136.

The previous prime is 51900421. The next prime is 51900449. The reversal of 51900444 is 44400915.

51900444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900449) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 720804 + ... + 720875.

Almost surely, 2^51900444 is an apocalyptic number.

It is an amenable number.

51900444 is an abundant number, since it is smaller than the sum of its proper divisors (79292436).

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

51900444 is a wasteful number, since it uses less digits than its factorization.

51900444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441689 (or 1441684 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51900444 is about 7204.1962771707. The cubic root of 51900444 is about 373.0127622991.

The spelling of 51900444 in words is "fifty-one million, nine hundred thousand, four hundred forty-four".