51431205203 has 8 divisors (see below), whose sum is σ = 61872126720. Its totient is φ = 41763685320.

The previous prime is 51431205193. The next prime is 51431205227. The reversal of 51431205203 is 30250213415.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51431205203 - 2⁶ = 51431205139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51431205253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193350263 + ... + 193350528.

It is an arithmetic number, because the mean of its divisors is an integer number (7734015840).

Almost surely, 2^51431205203 is an apocalyptic number.

51431205203 is a deficient number, since it is larger than the sum of its proper divisors (10440921517).

51431205203 is a wasteful number, since it uses less digits than its factorization.

51431205203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386700817.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 51431205203 its reverse (30250213415), we get a palindrome (81681418618).

The spelling of 51431205203 in words is "fifty-one billion, four hundred thirty-one million, two hundred five thousand, two hundred three".