51905693 has 8 divisors (see below), whose sum is σ = 60293760. Its totient is φ = 43760880.

The previous prime is 51905683. The next prime is 51905699. The reversal of 51905693 is 39650915.

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

It is a cyclic number.

It is not a de Polignac number, because 51905693 - 2⁶ = 51905629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51905699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60353 + ... + 61206.

It is an arithmetic number, because the mean of its divisors is an integer number (7536720).

Almost surely, 2^51905693 is an apocalyptic number.

It is an amenable number.

51905693 is a deficient number, since it is larger than the sum of its proper divisors (8388067).

51905693 is a wasteful number, since it uses less digits than its factorization.

51905693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121627.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 51905693 is about 7204.5605695282. The cubic root of 51905693 is about 373.0253368735.

The spelling of 51905693 in words is "fifty-one million, nine hundred five thousand, six hundred ninety-three".