51748807 has 4 divisors (see below), whose sum is σ = 56453256. Its totient is φ = 47044360.

The previous prime is 51748793. The next prime is 51748811. The reversal of 51748807 is 70884715.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51748807 - 2¹⁵ = 51716039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51748807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51748007) 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, 2352208 + ... + 2352229.

It is an arithmetic number, because the mean of its divisors is an integer number (14113314).

Almost surely, 2^51748807 is an apocalyptic number.

51748807 is a deficient number, since it is larger than the sum of its proper divisors (4704449).

51748807 is a wasteful number, since it uses less digits than its factorization.

51748807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704448.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 51748807 is about 7193.6643652592. The cubic root of 51748807 is about 372.6491320645.

The spelling of 51748807 in words is "fifty-one million, seven hundred forty-eight thousand, eight hundred seven".