13423431511251 has 24 divisors (see below), whose sum is σ = 20655798246720. Its totient is φ = 8375812677936.

The previous prime is 13423431511229. The next prime is 13423431511261. The reversal of 13423431511251 is 15211513432431.

13423431511251 is a `hidden beast` number, since 1 + 3 + 42 + 343 + 15 + 11 + 251 = 666.

It is not a de Polignac number, because 13423431511251 - 2¹¹ = 13423431509203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13423431511211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472874961 + ... + 472903346.

It is an arithmetic number, because the mean of its divisors is an integer number (860658260280).

Almost surely, 2^{13423431511251} is an apocalyptic number.

13423431511251 is a deficient number, since it is larger than the sum of its proper divisors (7232366735469).

13423431511251 is a wasteful number, since it uses less digits than its factorization.

13423431511251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945778415 (or 945778412 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

Adding to 13423431511251 its reverse (15211513432431), we get a palindrome (28634944943682).

The spelling of 13423431511251 in words is "thirteen trillion, four hundred twenty-three billion, four hundred thirty-one million, five hundred eleven thousand, two hundred fifty-one".