51768243 has 12 divisors (see below), whose sum is σ = 75057840. Its totient is φ = 34382256.

The previous prime is 51768229. The next prime is 51768263. The reversal of 51768243 is 34286715.

It is not a de Polignac number, because 51768243 - 2²⁰ = 50719667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51768198 and 51768207.

It is not an unprimeable number, because it can be changed into a prime (51768203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8271 + ... + 13112.

It is an arithmetic number, because the mean of its divisors is an integer number (6254820).

Almost surely, 2^51768243 is an apocalyptic number.

51768243 is a deficient number, since it is larger than the sum of its proper divisors (23289597).

51768243 is a wasteful number, since it uses less digits than its factorization.

51768243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21658 (or 21655 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51768243 is about 7195.0151493934. The cubic root of 51768243 is about 372.6957798514.

The spelling of 51768243 in words is "fifty-one million, seven hundred sixty-eight thousand, two hundred forty-three".