51237280 has 48 divisors (see below), whose sum is σ = 121492224. Its totient is φ = 20419840.

The previous prime is 51237253. The next prime is 51237289. The reversal of 51237280 is 8273215.

It is a super-3 number, since 3×51237280³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51237289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68589 + ... + 69331.

It is an arithmetic number, because the mean of its divisors is an integer number (2531088).

Almost surely, 2^51237280 is an apocalyptic number.

It is an amenable number.

51237280 is an abundant number, since it is smaller than the sum of its proper divisors (70254944).

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

51237280 is a wasteful number, since it uses less digits than its factorization.

51237280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 51237280 is about 7158.0220731708. The cubic root of 51237280 is about 371.4172090072.

It can be divided in two parts, 5123 and 7280, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 51237280 in words is "fifty-one million, two hundred thirty-seven thousand, two hundred eighty".