51731036 has 12 divisors (see below), whose sum is σ = 103462128. Its totient is φ = 22170432.

The previous prime is 51731027. The next prime is 51731039. The reversal of 51731036 is 63013715.

It is a happy number.

51731036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

51731036 is an admirable number.

It is a super-2 number, since 2×51731036² = 5352200171266592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51730996 and 51731014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51731039) 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 3 ways as a sum of consecutive naturals, for example, 923741 + ... + 923796.

It is an arithmetic number, because the mean of its divisors is an integer number (8621844).

Almost surely, 2^51731036 is an apocalyptic number.

It is an amenable number.

51731036 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.

51731036 is a wasteful number, since it uses less digits than its factorization.

51731036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847548 (or 1847546 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 51731036 is about 7192.4290750761. The cubic root of 51731036 is about 372.6064701732.

The spelling of 51731036 in words is "fifty-one million, seven hundred thirty-one thousand, thirty-six".