51647953 has 8 divisors (see below), whose sum is σ = 60930560. Its totient is φ = 42841440.

The previous prime is 51647879. The next prime is 51647963. The reversal of 51647953 is 35974615.

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-51647953 is a prime.

It is a super-2 number, since 2×51647953² = 5335022098180418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51647963) by changing a digit.

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, 118788 + ... + 119221.

It is an arithmetic number, because the mean of its divisors is an integer number (7616320).

Almost surely, 2^51647953 is an apocalyptic number.

It is an amenable number.

51647953 is a deficient number, since it is larger than the sum of its proper divisors (9282607).

51647953 is a wasteful number, since it uses less digits than its factorization.

51647953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238047.

The product of its digits is 113400, while the sum is 40.

The square root of 51647953 is about 7186.6510281215. The cubic root of 51647953 is about 372.4068875268.

The spelling of 51647953 in words is "fifty-one million, six hundred forty-seven thousand, nine hundred fifty-three".