51629443 has 4 divisors (see below), whose sum is σ = 51697008. Its totient is φ = 51561880.

The previous prime is 51629419. The next prime is 51629489. The reversal of 51629443 is 34492615.

It is a happy number.

51629443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51629443 - 2⁹ = 51628931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51629399 and 51629408.

It is not an unprimeable number, because it can be changed into a prime (51629843) 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 3 ways as a sum of consecutive naturals, for example, 32623 + ... + 34168.

It is an arithmetic number, because the mean of its divisors is an integer number (12924252).

Almost surely, 2^51629443 is an apocalyptic number.

51629443 is a deficient number, since it is larger than the sum of its proper divisors (67565).

51629443 is an equidigital number, since it uses as much as digits as its factorization.

51629443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67564.

The product of its digits is 25920, while the sum is 34.

The square root of 51629443 is about 7185.3631084309. The cubic root of 51629443 is about 372.3623935069.

The spelling of 51629443 in words is "fifty-one million, six hundred twenty-nine thousand, four hundred forty-three".