51696731 has 8 divisors (see below), whose sum is σ = 53137920. Its totient is φ = 50275368.

The previous prime is 51696727. The next prime is 51696761. The reversal of 51696731 is 13769615.

51696731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51696731 - 2² = 51696727 is a prime.

It is a super-2 number, since 2×51696731² = 5345103992172722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51696761) 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 7 ways as a sum of consecutive naturals, for example, 410 + ... + 10176.

It is an arithmetic number, because the mean of its divisors is an integer number (6642240).

Almost surely, 2^51696731 is an apocalyptic number.

51696731 is a deficient number, since it is larger than the sum of its proper divisors (1441189).

51696731 is an equidigital number, since it uses as much as digits as its factorization.

51696731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9913.

The product of its digits is 34020, while the sum is 38.

The square root of 51696731 is about 7190.0438802555. The cubic root of 51696731 is about 372.5240883481.

The spelling of 51696731 in words is "fifty-one million, six hundred ninety-six thousand, seven hundred thirty-one".