51756723 has 6 divisors (see below), whose sum is σ = 74759724. Its totient is φ = 34504476.

The previous prime is 51756713. The next prime is 51756751. The reversal of 51756723 is 32765715.

It is a de Polignac number, because none of the positive numbers 2^k-51756723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51756713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2875365 + ... + 2875382.

It is an arithmetic number, because the mean of its divisors is an integer number (12459954).

Almost surely, 2^51756723 is an apocalyptic number.

51756723 is a deficient number, since it is larger than the sum of its proper divisors (23003001).

51756723 is a wasteful number, since it uses less digits than its factorization.

51756723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750753 (or 5750750 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 51756723 is about 7194.2145505955. The cubic root of 51756723 is about 372.6681324389.

The spelling of 51756723 in words is "fifty-one million, seven hundred fifty-six thousand, seven hundred twenty-three".