51845144 has 48 divisors (see below), whose sum is σ = 108745920. Its totient is φ = 23137920.

The previous prime is 51845141. The next prime is 51845149. The reversal of 51845144 is 44154815.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 51845144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51845141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41294 + ... + 42530.

It is an arithmetic number, because the mean of its divisors is an integer number (2265540).

Almost surely, 2^51845144 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 51845144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54372960).

51845144 is an abundant number, since it is smaller than the sum of its proper divisors (56900776).

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

51845144 is a wasteful number, since it uses less digits than its factorization.

51845144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1283 counting only the distinct ones).

The product of its digits is 12800, while the sum is 32.

The square root of 51845144 is about 7200.3572133610. The cubic root of 51845144 is about 372.8802333343.

Adding to 51845144 its reverse (44154815), we get a palindrome (95999959).

The spelling of 51845144 in words is "fifty-one million, eight hundred forty-five thousand, one hundred forty-four".