51305144 has 16 divisors (see below), whose sum is σ = 104942520. Its totient is φ = 23320480.

The previous prime is 51305141. The next prime is 51305171. The reversal of 51305144 is 44150315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51305141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291419 + ... + 291594.

Almost surely, 2^51305144 is an apocalyptic number.

It is an amenable number.

51305144 is an abundant number, since it is smaller than the sum of its proper divisors (53637376).

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

51305144 is a wasteful number, since it uses less digits than its factorization.

51305144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583030 (or 583026 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51305144 is about 7162.7609202039. The cubic root of 51305144 is about 371.5811178982.

Adding to 51305144 its reverse (44150315), we get a palindrome (95455459).

The spelling of 51305144 in words is "fifty-one million, three hundred five thousand, one hundred forty-four".