51432945 has 32 divisors (see below), whose sum is σ = 87892992. Its totient is φ = 25620672.

The previous prime is 51432917. The next prime is 51432961. The reversal of 51432945 is 54923415.

51432945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51432945 - 2¹⁵ = 51400177 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 13102 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (2746656).

Almost surely, 2^51432945 is an apocalyptic number.

It is an amenable number.

51432945 is a deficient number, since it is larger than the sum of its proper divisors (36460047).

51432945 is a wasteful number, since it uses less digits than its factorization.

51432945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541.

The product of its digits is 21600, while the sum is 33.

The square root of 51432945 is about 7171.6765822226. The cubic root of 51432945 is about 371.8893979784.

The spelling of 51432945 in words is "fifty-one million, four hundred thirty-two thousand, nine hundred forty-five".