51803693 has 4 divisors (see below), whose sum is σ = 52030140. Its totient is φ = 51577248.

The previous prime is 51803669. The next prime is 51803699. The reversal of 51803693 is 39630815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30891364 + 20912329 = 5558^2 + 4573^2 .

It is a cyclic number.

It is not a de Polignac number, because 51803693 - 2¹⁰ = 51802669 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 (51803699) 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, 112880 + ... + 113337.

It is an arithmetic number, because the mean of its divisors is an integer number (13007535).

Almost surely, 2^51803693 is an apocalyptic number.

It is an amenable number.

51803693 is a deficient number, since it is larger than the sum of its proper divisors (226447).

51803693 is a wasteful number, since it uses less digits than its factorization.

51803693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226446.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 51803693 is about 7197.4782389390. The cubic root of 51803693 is about 372.7808323210.

The spelling of 51803693 in words is "fifty-one million, eight hundred three thousand, six hundred ninety-three".