51171793 has 4 divisors (see below), whose sum is σ = 52822528. Its totient is φ = 49521060.

The previous prime is 51171773. The next prime is 51171797. The reversal of 51171793 is 39717115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51171793 - 2⁵ = 51171761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51171797) 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, 825321 + ... + 825382.

It is an arithmetic number, because the mean of its divisors is an integer number (13205632).

Almost surely, 2^51171793 is an apocalyptic number.

It is an amenable number.

51171793 is a deficient number, since it is larger than the sum of its proper divisors (1650735).

51171793 is a wasteful number, since it uses less digits than its factorization.

51171793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650734.

The product of its digits is 6615, while the sum is 34.

The square root of 51171793 is about 7153.4462324113. The cubic root of 51171793 is about 371.2589039043.

The spelling of 51171793 in words is "fifty-one million, one hundred seventy-one thousand, seven hundred ninety-three".