51203940329 has 4 divisors (see below), whose sum is σ = 51204850320. Its totient is φ = 51203030340.

The previous prime is 51203940317. The next prime is 51203940331. The reversal of 51203940329 is 92304930215.

It is a happy number.

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 51203940329 - 2¹⁶ = 51203874793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51203940292 and 51203940301.

It is not an unprimeable number, because it can be changed into a prime (51203960329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364607 + ... + 485124.

It is an arithmetic number, because the mean of its divisors is an integer number (12801212580).

Almost surely, 2^51203940329 is an apocalyptic number.

It is an amenable number.

51203940329 is a deficient number, since it is larger than the sum of its proper divisors (909991).

51203940329 is an equidigital number, since it uses as much as digits as its factorization.

51203940329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909990.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 51203940329 in words is "fifty-one billion, two hundred three million, nine hundred forty thousand, three hundred twenty-nine".