51308755 has 4 divisors (see below), whose sum is σ = 61570512. Its totient is φ = 41047000.

The previous prime is 51308731. The next prime is 51308773. The reversal of 51308755 is 55780315.

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

It is not a de Polignac number, because 51308755 - 2⁵ = 51308723 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 51308755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5130871 + ... + 5130880.

It is an arithmetic number, because the mean of its divisors is an integer number (15392628).

Almost surely, 2^51308755 is an apocalyptic number.

51308755 is a deficient number, since it is larger than the sum of its proper divisors (10261757).

51308755 is a wasteful number, since it uses less digits than its factorization.

51308755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261756.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 51308755 is about 7163.0129833751. The cubic root of 51308755 is about 371.5898353343.

The spelling of 51308755 in words is "fifty-one million, three hundred eight thousand, seven hundred fifty-five".