51240180 has 48 divisors (see below), whose sum is σ = 143942400. Its totient is φ = 13619328.

The previous prime is 51240121. The next prime is 51240221. The reversal of 51240180 is 8104215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19717 + ... + 22163.

It is an arithmetic number, because the mean of its divisors is an integer number (2998800).

Almost surely, 2^51240180 is an apocalyptic number.

It is an amenable number.

51240180 is an abundant number, since it is smaller than the sum of its proper divisors (92702220).

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

51240180 is a wasteful number, since it uses less digits than its factorization.

51240180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 51240180 is about 7158.2246402303. The cubic root of 51240180 is about 371.4242162070.

Adding to 51240180 its reverse (8104215), we get a palindrome (59344395).

The spelling of 51240180 in words is "fifty-one million, two hundred forty thousand, one hundred eighty".