51338923 has 4 divisors (see below), whose sum is σ = 51451720. Its totient is φ = 51226128.

The previous prime is 51338897. The next prime is 51338939. The reversal of 51338923 is 32983315.

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 51338923 - 2⁹ = 51338411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51338953) 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, 55713 + ... + 56626.

It is an arithmetic number, because the mean of its divisors is an integer number (12862930).

Almost surely, 2^51338923 is an apocalyptic number.

51338923 is a deficient number, since it is larger than the sum of its proper divisors (112797).

51338923 is a wasteful number, since it uses less digits than its factorization.

51338923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112796.

The product of its digits is 19440, while the sum is 34.

The square root of 51338923 is about 7165.1184916929. The cubic root of 51338923 is about 371.6626489363.

The spelling of 51338923 in words is "fifty-one million, three hundred thirty-eight thousand, nine hundred twenty-three".