51328694 has 32 divisors (see below), whose sum is σ = 81932256. Its totient is φ = 24088320.

The previous prime is 51328687. The next prime is 51328699. The reversal of 51328694 is 49682315.

It is a happy number.

Its product of digits (51840) is a multiple of the sum of its prime divisors (320).

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51328699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374594 + ... + 374730.

It is an arithmetic number, because the mean of its divisors is an integer number (2560383).

Almost surely, 2^51328694 is an apocalyptic number.

51328694 is a deficient number, since it is larger than the sum of its proper divisors (30603562).

51328694 is a wasteful number, since it uses less digits than its factorization.

51328694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 51840, while the sum is 38.

The square root of 51328694 is about 7164.4046507718. The cubic root of 51328694 is about 371.6379633791.

The spelling of 51328694 in words is "fifty-one million, three hundred twenty-eight thousand, six hundred ninety-four".