51721734 has 8 divisors (see below), whose sum is σ = 103443480. Its totient is φ = 17240576.

The previous prime is 51721721. The next prime is 51721739. The reversal of 51721734 is 43712715.

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

51721734 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51721739) 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, 4310139 + ... + 4310150.

It is an arithmetic number, because the mean of its divisors is an integer number (12930435).

Almost surely, 2^51721734 is an apocalyptic number.

51721734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51721734 is a wasteful number, since it uses less digits than its factorization.

51721734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8620294.

The product of its digits is 5880, while the sum is 30.

The square root of 51721734 is about 7191.7823938159. The cubic root of 51721734 is about 372.5841354627.

The spelling of 51721734 in words is "fifty-one million, seven hundred twenty-one thousand, seven hundred thirty-four".