51512251423 has 8 divisors (see below), whose sum is σ = 51846206960. Its totient is φ = 51179143680.

The previous prime is 51512251397. The next prime is 51512251459. The reversal of 51512251423 is 32415221515.

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

It is a cyclic number.

It is not a de Polignac number, because 51512251423 - 2²¹ = 51510154271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512251493) 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 7 ways as a sum of consecutive naturals, for example, 89808 + ... + 333301.

It is an arithmetic number, because the mean of its divisors is an integer number (6480775870).

Almost surely, 2^51512251423 is an apocalyptic number.

51512251423 is a deficient number, since it is larger than the sum of its proper divisors (333955537).

51512251423 is a wasteful number, since it uses less digits than its factorization.

51512251423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423897.

The product of its digits is 12000, while the sum is 31.

Adding to 51512251423 its reverse (32415221515), we get a palindrome (83927472938).

The spelling of 51512251423 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-one thousand, four hundred twenty-three".