51649383 has 8 divisors (see below), whose sum is σ = 72916848. Its totient is φ = 32407424.

The previous prime is 51649313. The next prime is 51649387. The reversal of 51649383 is 38394615.

51649383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51649383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51649387) 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 7 ways as a sum of consecutive naturals, for example, 506316 + ... + 506417.

It is an arithmetic number, because the mean of its divisors is an integer number (9114606).

Almost surely, 2^51649383 is an apocalyptic number.

51649383 is a deficient number, since it is larger than the sum of its proper divisors (21267465).

51649383 is a wasteful number, since it uses less digits than its factorization.

51649383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012753.

The product of its digits is 77760, while the sum is 39.

The square root of 51649383 is about 7186.7505174453. The cubic root of 51649383 is about 372.4103244938.

The spelling of 51649383 in words is "fifty-one million, six hundred forty-nine thousand, three hundred eighty-three".