51691834 has 8 divisors (see below), whose sum is σ = 78630048. Its totient is φ = 25481820.

The previous prime is 51691831. The next prime is 51691859. The reversal of 51691834 is 43819615.

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

It is a junction number, because it is equal to n+sod(n) for n = 51691793 and 51691802.

It is not an unprimeable number, because it can be changed into a prime (51691831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181872 + ... + 182155.

It is an arithmetic number, because the mean of its divisors is an integer number (9828756).

Almost surely, 2^51691834 is an apocalyptic number.

51691834 is a deficient number, since it is larger than the sum of its proper divisors (26938214).

51691834 is a wasteful number, since it uses less digits than its factorization.

51691834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364100.

The product of its digits is 25920, while the sum is 37.

The square root of 51691834 is about 7189.7033318490. The cubic root of 51691834 is about 372.5123254634.

It can be divided in two parts, 51691 and 834, that added together give a palindrome (52525).

The spelling of 51691834 in words is "fifty-one million, six hundred ninety-one thousand, eight hundred thirty-four".