51704243 has 4 divisors (see below), whose sum is σ = 51910488. Its totient is φ = 51498000.

The previous prime is 51704227. The next prime is 51704267. The reversal of 51704243 is 34240715.

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 51704243 - 2⁴ = 51704227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51704143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102746 + ... + 103247.

It is an arithmetic number, because the mean of its divisors is an integer number (12977622).

Almost surely, 2^51704243 is an apocalyptic number.

51704243 is a deficient number, since it is larger than the sum of its proper divisors (206245).

51704243 is a wasteful number, since it uses less digits than its factorization.

51704243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206244.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 51704243 is about 7190.5662503032. The cubic root of 51704243 is about 372.5421311744.

Adding to 51704243 its reverse (34240715), we get a palindrome (85944958).

The spelling of 51704243 in words is "fifty-one million, seven hundred four thousand, two hundred forty-three".