51224544 has 72 divisors (see below), whose sum is σ = 166486320. Its totient is φ = 14635008.

The previous prime is 51224507. The next prime is 51224549. The reversal of 51224544 is 44542215.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224549) 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, 10689 + ... + 14720.

It is an arithmetic number, because the mean of its divisors is an integer number (2312310).

Almost surely, 2^51224544 is an apocalyptic number.

It is an amenable number.

51224544 is an abundant number, since it is smaller than the sum of its proper divisors (115261776).

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

51224544 is a wasteful number, since it uses less digits than its factorization.

51224544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25432 (or 25421 counting only the distinct ones).

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

The square root of 51224544 is about 7157.1323866476. The cubic root of 51224544 is about 371.3864321876.

Adding to 51224544 its reverse (44542215), we get a palindrome (95766759).

The spelling of 51224544 in words is "fifty-one million, two hundred twenty-four thousand, five hundred forty-four".