51640033 has 16 divisors (see below), whose sum is σ = 57347136. Its totient is φ = 46287360.

The previous prime is 51640031. The next prime is 51640051. The reversal of 51640033 is 33004615.

It is not a de Polignac number, because 51640033 - 2¹ = 51640031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51639986 and 51640013.

It is not an unprimeable number, because it can be changed into a prime (51640031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29110 + ... + 30832.

It is an arithmetic number, because the mean of its divisors is an integer number (3584196).

Almost surely, 2^51640033 is an apocalyptic number.

It is an amenable number.

51640033 is a deficient number, since it is larger than the sum of its proper divisors (5707103).

51640033 is a wasteful number, since it uses less digits than its factorization.

51640033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 51640033 is about 7186.0999853885. The cubic root of 51640033 is about 372.3878508683.

Adding to 51640033 its reverse (33004615), we get a palindrome (84644648).

The spelling of 51640033 in words is "fifty-one million, six hundred forty thousand, thirty-three".