51629705 has 8 divisors (see below), whose sum is σ = 62594952. Its totient is φ = 40877568.

The previous prime is 51629693. The next prime is 51629741. The reversal of 51629705 is 50792615.

51629705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10310521 + 41319184 = 3211^2 + 6428^2 .

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-51629705 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 52742 + ... + 53711.

It is an arithmetic number, because the mean of its divisors is an integer number (7824369).

Almost surely, 2^51629705 is an apocalyptic number.

It is an amenable number.

51629705 is a deficient number, since it is larger than the sum of its proper divisors (10965247).

51629705 is a wasteful number, since it uses less digits than its factorization.

51629705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106555.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 51629705 is about 7185.3813399151. The cubic root of 51629705 is about 372.3630233722.

The spelling of 51629705 in words is "fifty-one million, six hundred twenty-nine thousand, seven hundred five".