51755240 has 32 divisors (see below), whose sum is σ = 122580000. Its totient is φ = 19612224.

The previous prime is 51755239. The next prime is 51755257. The reversal of 51755240 is 4255715.

51755240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 33290 + ... + 34809.

It is an arithmetic number, because the mean of its divisors is an integer number (3830625).

Almost surely, 2^51755240 is an apocalyptic number.

It is an amenable number.

51755240 is an abundant number, since it is smaller than the sum of its proper divisors (70824760).

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

51755240 is a wasteful number, since it uses less digits than its factorization.

51755240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68129 (or 68125 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 51755240 is about 7194.1114809266. Note that the first 3 decimals coincide. The cubic root of 51755240 is about 372.6645730165.

The spelling of 51755240 in words is "fifty-one million, seven hundred fifty-five thousand, two hundred forty".