51240260 has 24 divisors (see below), whose sum is σ = 109213440. Its totient is φ = 20189664.

The previous prime is 51240253. The next prime is 51240307. The reversal of 51240260 is 6204215.

It is a happy number.

51240260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17780 + ... + 20459.

It is an arithmetic number, because the mean of its divisors is an integer number (4550560).

Almost surely, 2^51240260 is an apocalyptic number.

It is an amenable number.

51240260 is an abundant number, since it is smaller than the sum of its proper divisors (57973180).

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

51240260 is a wasteful number, since it uses less digits than its factorization.

51240260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38315 (or 38313 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51240260 is about 7158.2302282059. The cubic root of 51240260 is about 371.4244095054.

Adding to 51240260 its reverse (6204215), we get a palindrome (57444475).

The spelling of 51240260 in words is "fifty-one million, two hundred forty thousand, two hundred sixty".