51331540033 has 4 divisors (see below), whose sum is σ = 51811274160. Its totient is φ = 50851805908.

The previous prime is 51331540031. The next prime is 51331540037. The reversal of 51331540033 is 33004513315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33004513315 = 5 ⋅6600902663.

It is a cyclic number.

It is not a de Polignac number, because 51331540033 - 2¹ = 51331540031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51331539983 and 51331540010.

It is not an unprimeable number, because it can be changed into a prime (51331540031) 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, 239866903 + ... + 239867116.

It is an arithmetic number, because the mean of its divisors is an integer number (12952818540).

Almost surely, 2^51331540033 is an apocalyptic number.

It is an amenable number.

51331540033 is a deficient number, since it is larger than the sum of its proper divisors (479734127).

51331540033 is a wasteful number, since it uses less digits than its factorization.

51331540033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479734126.

The product of its (nonzero) digits is 8100, while the sum is 28.

The spelling of 51331540033 in words is "fifty-one billion, three hundred thirty-one million, five hundred forty thousand, thirty-three".