51806938 has 8 divisors (see below), whose sum is σ = 77745888. Its totient is φ = 25891644.

The previous prime is 51806929. The next prime is 51806957. The reversal of 51806938 is 83960815.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51806938.

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, 1345 + ... + 10267.

It is an arithmetic number, because the mean of its divisors is an integer number (9718236).

Almost surely, 2^51806938 is an apocalyptic number.

51806938 is a deficient number, since it is larger than the sum of its proper divisors (25938950).

51806938 is a wasteful number, since it uses less digits than its factorization.

51806938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 51806938 is about 7197.7036615854. The cubic root of 51806938 is about 372.7886158622.

The spelling of 51806938 in words is "fifty-one million, eight hundred six thousand, nine hundred thirty-eight".