13143506231 has 4 divisors (see below), whose sum is σ = 13152382464. Its totient is φ = 13134630000.

The previous prime is 13143506227. The next prime is 13143506273. The reversal of 13143506231 is 13260534131.

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 13143506231 - 2² = 13143506227 is a prime.

It is a super-2 number, since 2×13143506231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13143506194 and 13143506203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143506281) 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, 4435895 + ... + 4438856.

It is an arithmetic number, because the mean of its divisors is an integer number (3288095616).

Almost surely, 2^13143506231 is an apocalyptic number.

13143506231 is a deficient number, since it is larger than the sum of its proper divisors (8876233).

13143506231 is an equidigital number, since it uses as much as digits as its factorization.

13143506231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876232.

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 13143506231 in words is "thirteen billion, one hundred forty-three million, five hundred six thousand, two hundred thirty-one".