51869472 has 24 divisors (see below), whose sum is σ = 136157616. Its totient is φ = 17289792.

The previous prime is 51869443. The next prime is 51869491. The reversal of 51869472 is 27496815.

51869472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

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, 270058 + ... + 270249.

It is an arithmetic number, because the mean of its divisors is an integer number (5673234).

Almost surely, 2^51869472 is an apocalyptic number.

It is an amenable number.

51869472 is an abundant number, since it is smaller than the sum of its proper divisors (84288144).

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

51869472 is a wasteful number, since it uses less digits than its factorization.

51869472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540320 (or 540312 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 51869472 is about 7202.0463758574. The cubic root of 51869472 is about 372.9385480969.

The spelling of 51869472 in words is "fifty-one million, eight hundred sixty-nine thousand, four hundred seventy-two".