51531420122203 has 48 divisors (see below), whose sum is σ = 61536282803424. Its totient is φ = 43003821611520.

The previous prime is 51531420122167. The next prime is 51531420122323. The reversal of 51531420122203 is 30222102413515.

It is a happy number.

It is not a de Polignac number, because 51531420122203 - 2⁹ = 51531420121691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51531420122003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1238804601 + ... + 1238846197.

It is an arithmetic number, because the mean of its divisors is an integer number (1282005891738).

Almost surely, 2^{51531420122203} is an apocalyptic number.

51531420122203 is a deficient number, since it is larger than the sum of its proper divisors (10004862681221).

51531420122203 is a wasteful number, since it uses less digits than its factorization.

51531420122203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43532 (or 43525 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 51531420122203 its reverse (30222102413515), we get a palindrome (81753522535718).

The spelling of 51531420122203 in words is "fifty-one trillion, five hundred thirty-one billion, four hundred twenty million, one hundred twenty-two thousand, two hundred three".