51631433 has 16 divisors (see below), whose sum is σ = 60677760. Its totient is φ = 43013376.

The previous prime is 51631357. The next prime is 51631457. The reversal of 51631433 is 33413615.

51631433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51631433 - 2¹⁴ = 51615049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51631483) 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 15 ways as a sum of consecutive naturals, for example, 101183 + ... + 101691.

It is an arithmetic number, because the mean of its divisors is an integer number (3792360).

Almost surely, 2^51631433 is an apocalyptic number.

It is an amenable number.

51631433 is a deficient number, since it is larger than the sum of its proper divisors (9046327).

51631433 is a wasteful number, since it uses less digits than its factorization.

51631433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 3240, while the sum is 26.

The square root of 51631433 is about 7185.5015830490. The cubic root of 51631433 is about 372.3671775449.

The spelling of 51631433 in words is "fifty-one million, six hundred thirty-one thousand, four hundred thirty-three".