51444120 has 192 divisors, whose sum is σ = 193626720. Its totient is φ = 10838016.

The previous prime is 51444119. The next prime is 51444137. The reversal of 51444120 is 2144415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76104 + ... + 76776.

Almost surely, 2^51444120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51444120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96813360).

51444120 is an abundant number, since it is smaller than the sum of its proper divisors (142182600).

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

51444120 is a wasteful number, since it uses less digits than its factorization.

51444120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 51444120 is about 7172.4556464296. The cubic root of 51444120 is about 371.9163298932.

Adding to 51444120 its reverse (2144415), we get a palindrome (53588535).

The spelling of 51444120 in words is "fifty-one million, four hundred forty-four thousand, one hundred twenty".