131605206053 has 4 divisors (see below), whose sum is σ = 139346688780. Its totient is φ = 123863723328.

The previous prime is 131605206001. The next prime is 131605206077. The reversal of 131605206053 is 350602506131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350602506131 = 2939 ⋅119293129.

It can be written as a sum of positive squares in 2 ways, for example, as 119565191524 + 12040014529 = 345782^2 + 109727^2 .

It is a cyclic number.

It is not a de Polignac number, because 131605206053 - 2²² = 131601011749 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 (131605206853) 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, 3870741338 + ... + 3870741371.

It is an arithmetic number, because the mean of its divisors is an integer number (34836672195).

Almost surely, 2^131605206053 is an apocalyptic number.

It is an amenable number.

131605206053 is a deficient number, since it is larger than the sum of its proper divisors (7741482727).

131605206053 is an equidigital number, since it uses as much as digits as its factorization.

131605206053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7741482726.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 131605206053 in words is "one hundred thirty-one billion, six hundred five million, two hundred six thousand, fifty-three".