51731849 has 8 divisors (see below), whose sum is σ = 56656320. Its totient is φ = 46942416.

The previous prime is 51731831. The next prime is 51731857. The reversal of 51731849 is 94813715.

51731849 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 51731849 - 2⁸ = 51731593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51731249) 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, 32957 + ... + 34490.

It is an arithmetic number, because the mean of its divisors is an integer number (7082040).

Almost surely, 2^51731849 is an apocalyptic number.

51731849 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51731849 is a deficient number, since it is larger than the sum of its proper divisors (4924471).

51731849 is a wasteful number, since it uses less digits than its factorization.

51731849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67519.

The product of its digits is 30240, while the sum is 38.

The square root of 51731849 is about 7192.4855926168. The cubic root of 51731849 is about 372.6084221122.

The spelling of 51731849 in words is "fifty-one million, seven hundred thirty-one thousand, eight hundred forty-nine".