51040415533 has 4 divisors (see below), whose sum is σ = 51041820960. Its totient is φ = 51039010108.

The previous prime is 51040415513. The next prime is 51040415539. The reversal of 51040415533 is 33551404015.

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: 33551404015 = 5 ⋅6710280803.

It is a cyclic number.

It is not a de Polignac number, because 51040415533 - 2⁹ = 51040415021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51040415495 and 51040415504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040415539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646753 + ... + 721366.

It is an arithmetic number, because the mean of its divisors is an integer number (12760455240).

Almost surely, 2^51040415533 is an apocalyptic number.

It is an amenable number.

51040415533 is a deficient number, since it is larger than the sum of its proper divisors (1405427).

51040415533 is a wasteful number, since it uses less digits than its factorization.

51040415533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405426.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 51040415533 its reverse (33551404015), we get a palindrome (84591819548).

The spelling of 51040415533 in words is "fifty-one billion, forty million, four hundred fifteen thousand, five hundred thirty-three".