51980444 has 12 divisors (see below), whose sum is σ = 91074984. Its totient is φ = 25959024.

The previous prime is 51980443. The next prime is 51980473. The reversal of 51980444 is 44408915.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51980443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827 + ... + 10890.

It is an arithmetic number, because the mean of its divisors is an integer number (7589582).

Almost surely, 2^51980444 is an apocalyptic number.

It is an amenable number.

51980444 is a deficient number, since it is larger than the sum of its proper divisors (39094540).

51980444 is a wasteful number, since it uses less digits than its factorization.

51980444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15604 (or 15602 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 51980444 is about 7209.7464587876. The cubic root of 51980444 is about 373.2043194379.

The spelling of 51980444 in words is "fifty-one million, nine hundred eighty thousand, four hundred forty-four".