51693111 has 12 divisors (see below), whose sum is σ = 74926488. Its totient is φ = 34342704.

The previous prime is 51693079. The next prime is 51693133. The reversal of 51693111 is 11139615.

51693111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51693111 - 2⁵ = 51693079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7165 + ... + 12438.

It is an arithmetic number, because the mean of its divisors is an integer number (6243874).

Almost surely, 2^51693111 is an apocalyptic number.

51693111 is a deficient number, since it is larger than the sum of its proper divisors (23233377).

51693111 is a wasteful number, since it uses less digits than its factorization.

51693111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19902 (or 19899 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 51693111 is about 7189.7921388591. The cubic root of 51693111 is about 372.5153929648.

The spelling of 51693111 in words is "fifty-one million, six hundred ninety-three thousand, one hundred eleven".