13115133061 has 4 divisors (see below), whose sum is σ = 13294792492. Its totient is φ = 12935473632.

The previous prime is 13115133047. The next prime is 13115133107. The reversal of 13115133061 is 16033151131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4092032961 + 9023100100 = 63969^2 + 94990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13115133061 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 (13115133961) 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, 89829606 + ... + 89829751.

It is an arithmetic number, because the mean of its divisors is an integer number (3323698123).

Almost surely, 2^13115133061 is an apocalyptic number.

It is an amenable number.

13115133061 is a deficient number, since it is larger than the sum of its proper divisors (179659431).

13115133061 is an equidigital number, since it uses as much as digits as its factorization.

13115133061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179659430.

The product of its (nonzero) digits is 810, while the sum is 25.

Adding to 13115133061 its reverse (16033151131), we get a palindrome (29148284192).

The spelling of 13115133061 in words is "thirteen billion, one hundred fifteen million, one hundred thirty-three thousand, sixty-one".