51523245321 has 4 divisors (see below), whose sum is σ = 68697660432. Its totient is φ = 34348830212.

The previous prime is 51523245317. The next prime is 51523245343. The reversal of 51523245321 is 12354232515.

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 a cyclic number.

It is not a de Polignac number, because 51523245321 - 2² = 51523245317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51523245721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8587207551 + ... + 8587207556.

It is an arithmetic number, because the mean of its divisors is an integer number (17174415108).

Almost surely, 2^51523245321 is an apocalyptic number.

It is an amenable number.

51523245321 is a deficient number, since it is larger than the sum of its proper divisors (17174415111).

51523245321 is a wasteful number, since it uses less digits than its factorization.

51523245321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17174415110.

The product of its digits is 36000, while the sum is 33.

Adding to 51523245321 its reverse (12354232515), we get a palindrome (63877477836).

The spelling of 51523245321 in words is "fifty-one billion, five hundred twenty-three million, two hundred forty-five thousand, three hundred twenty-one".