51404544 has 180 divisors, whose sum is σ = 159771304. Its totient is φ = 16422912.

The previous prime is 51404539. The next prime is 51404567. The reversal of 51404544 is 44540415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 767199 + ... + 767265.

Almost surely, 2^51404544 is an apocalyptic number.

51404544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51404544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79885652).

51404544 is an abundant number, since it is smaller than the sum of its proper divisors (108366760).

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

51404544 is an equidigital number, since it uses as much as digits as its factorization.

51404544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 51404544 is about 7169.6962278747. The cubic root of 51404544 is about 371.8209335893.

Adding to 51404544 its reverse (44540415), we get a palindrome (95944959).

It can be divided in two parts, 514045 and 44, that added together give a square (514089 = 717²).

The spelling of 51404544 in words is "fifty-one million, four hundred four thousand, five hundred forty-four".