51643359 has 32 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 33415200.

The previous prime is 51643351. The next prime is 51643367. The reversal of 51643359 is 95334615.

51643359 = 961² + 962² + ... + 1013².

51643359 is a `hidden beast` number, since 5 + 1 + 643 + 3 + 5 + 9 = 666.

51643359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51643351) and next prime (51643367).

It is not a de Polignac number, because 51643359 - 2³ = 51643351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51643351) by changing a digit.

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, 215962 + ... + 216200.

It is an arithmetic number, because the mean of its divisors is an integer number (2462400).

Almost surely, 2^51643359 is an apocalyptic number.

51643359 is a deficient number, since it is larger than the sum of its proper divisors (27153441).

51643359 is a wasteful number, since it uses less digits than its factorization.

51643359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 446 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 51643359 is about 7186.3314006522. The cubic root of 51643359 is about 372.3958455405.

The spelling of 51643359 in words is "fifty-one million, six hundred forty-three thousand, three hundred fifty-nine".