51520441233 has 4 divisors (see below), whose sum is σ = 68693921648. Its totient is φ = 34346960820.

The previous prime is 51520441223. The next prime is 51520441327. The reversal of 51520441233 is 33214402515.

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.

It is not a de Polignac number, because 51520441233 - 2⁶ = 51520441169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51520441233.

It is not an unprimeable number, because it can be changed into a prime (51520441223) 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, 8586740203 + ... + 8586740208.

It is an arithmetic number, because the mean of its divisors is an integer number (17173480412).

Almost surely, 2^51520441233 is an apocalyptic number.

It is an amenable number.

51520441233 is a deficient number, since it is larger than the sum of its proper divisors (17173480415).

51520441233 is a wasteful number, since it uses less digits than its factorization.

51520441233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17173480414.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 51520441233 its reverse (33214402515), we get a palindrome (84734843748).

The spelling of 51520441233 in words is "fifty-one billion, five hundred twenty million, four hundred forty-one thousand, two hundred thirty-three".