51144620 has 12 divisors (see below), whose sum is σ = 107403744. Its totient is φ = 20457840.

The previous prime is 51144607. The next prime is 51144623. The reversal of 51144620 is 2644115.

51144620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51144623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278596 + ... + 1278635.

It is an arithmetic number, because the mean of its divisors is an integer number (8950312).

Almost surely, 2^51144620 is an apocalyptic number.

It is an amenable number.

51144620 is an abundant number, since it is smaller than the sum of its proper divisors (56259124).

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

51144620 is a wasteful number, since it uses less digits than its factorization.

51144620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557240 (or 2557238 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 51144620 is about 7151.5466858575. The cubic root of 51144620 is about 371.1931775618.

Adding to 51144620 its reverse (2644115), we get a palindrome (53788735).

The spelling of 51144620 in words is "fifty-one million, one hundred forty-four thousand, six hundred twenty".