51947605 has 8 divisors (see below), whose sum is σ = 62430264. Its totient is φ = 41496000.

The previous prime is 51947591. The next prime is 51947641. The reversal of 51947605 is 50674915.

It can be written as a sum of positive squares in 4 ways, for example, as 11675889 + 40271716 = 3417^2 + 6346^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-51947605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3906 + ... + 10915.

It is an arithmetic number, because the mean of its divisors is an integer number (7803783).

Almost surely, 2^51947605 is an apocalyptic number.

It is an amenable number.

51947605 is a deficient number, since it is larger than the sum of its proper divisors (10482659).

51947605 is a wasteful number, since it uses less digits than its factorization.

51947605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15527.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 51947605 is about 7207.4686957350. The cubic root of 51947605 is about 373.1257114238.

The spelling of 51947605 in words is "fifty-one million, nine hundred forty-seven thousand, six hundred five".