51575240 has 16 divisors (see below), whose sum is σ = 116044380. Its totient is φ = 20630080.

The previous prime is 51575231. The next prime is 51575261. The reversal of 51575240 is 4257515.

51575240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47306884 + 4268356 = 6878^2 + 2066^2 .

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 3 ways as a sum of consecutive naturals, for example, 644651 + ... + 644730.

Almost surely, 2^51575240 is an apocalyptic number.

It is an amenable number.

51575240 is an abundant number, since it is smaller than the sum of its proper divisors (64469140).

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

51575240 is a wasteful number, since it uses less digits than its factorization.

51575240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289392 (or 1289388 counting only the distinct ones).

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

The square root of 51575240 is about 7181.5903531182. The cubic root of 51575240 is about 372.2320400701.

It can be divided in two parts, 51575 and 240, that added together give a palindrome (51815).

The spelling of 51575240 in words is "fifty-one million, five hundred seventy-five thousand, two hundred forty".