13205131541 has 4 divisors (see below), whose sum is σ = 15091578912. Its totient is φ = 11318684172.

The previous prime is 13205131507. The next prime is 13205131559. The reversal of 13205131541 is 14513150231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13205131541 - 2²² = 13200937237 is a prime.

It is a super-2 number, since 2×13205131541² (a number of 21 digits) contains 22 as substring.

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 13205131541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13205131241) 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, 943223675 + ... + 943223688.

It is an arithmetic number, because the mean of its divisors is an integer number (3772894728).

Almost surely, 2^13205131541 is an apocalyptic number.

It is an amenable number.

13205131541 is a deficient number, since it is larger than the sum of its proper divisors (1886447371).

13205131541 is an equidigital number, since it uses as much as digits as its factorization.

13205131541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886447370.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 13205131541 its reverse (14513150231), we get a palindrome (27718281772).

The spelling of 13205131541 in words is "thirteen billion, two hundred five million, one hundred thirty-one thousand, five hundred forty-one".