51331033 has 4 divisors (see below), whose sum is σ = 55279588. Its totient is φ = 47382480.

The previous prime is 51331019. The next prime is 51331051. The reversal of 51331033 is 33013315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33013315 = 5 ⋅6602663.

It can be written as a sum of positive squares in 2 ways, for example, as 17073424 + 34257609 = 4132^2 + 5853^2 .

It is a cyclic number.

It is not a de Polignac number, because 51331033 - 2²⁵ = 17776601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51331033.

It is not an unprimeable number, because it can be changed into a prime (51331013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974258 + ... + 1974283.

It is an arithmetic number, because the mean of its divisors is an integer number (13819897).

Almost surely, 2^51331033 is an apocalyptic number.

It is an amenable number.

51331033 is a deficient number, since it is larger than the sum of its proper divisors (3948555).

51331033 is a wasteful number, since it uses less digits than its factorization.

51331033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948554.

The product of its (nonzero) digits is 405, while the sum is 19.

The square root of 51331033 is about 7164.5678864814. The cubic root of 51331033 is about 371.6436083568.

Adding to 51331033 its reverse (33013315), we get a palindrome (84344348).

The spelling of 51331033 in words is "fifty-one million, three hundred thirty-one thousand, thirty-three".