13213125431 has 4 divisors (see below), whose sum is σ = 14414318664. Its totient is φ = 12011932200.

The previous prime is 13213125421. The next prime is 13213125439. The reversal of 13213125431 is 13452131231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13213125431 - 2¹⁴ = 13213109047 is a prime.

It is a super-3 number, since 3×13213125431³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13213125431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213125439) 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, 600596600 + ... + 600596621.

It is an arithmetic number, because the mean of its divisors is an integer number (3603579666).

Almost surely, 2^13213125431 is an apocalyptic number.

13213125431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13213125431 is a deficient number, since it is larger than the sum of its proper divisors (1201193233).

13213125431 is a wasteful number, since it uses less digits than its factorization.

13213125431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201193232.

The product of its digits is 2160, while the sum is 26.

Adding to 13213125431 its reverse (13452131231), we get a palindrome (26665256662).

The spelling of 13213125431 in words is "thirteen billion, two hundred thirteen million, one hundred twenty-five thousand, four hundred thirty-one".