131254205605 has 8 divisors (see below), whose sum is σ = 157526523000. Its totient is φ = 104989046976.

The previous prime is 131254205549. The next prime is 131254205611. The reversal of 131254205605 is 506502452131.

It can be written as a sum of positive squares in 4 ways, for example, as 8346466881 + 122907738724 = 91359^2 + 350582^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131254205605 - 2¹³ = 131254197413 is a prime.

It is a super-2 number, since 2×131254205605² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749270 + ... + 1822759.

It is an arithmetic number, because the mean of its divisors is an integer number (19690815375).

Almost surely, 2^131254205605 is an apocalyptic number.

It is an amenable number.

131254205605 is a deficient number, since it is larger than the sum of its proper divisors (26272317395).

131254205605 is an equidigital number, since it uses as much as digits as its factorization.

131254205605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579383.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 131254205605 its reverse (506502452131), we get a palindrome (637756657736).

The spelling of 131254205605 in words is "one hundred thirty-one billion, two hundred fifty-four million, two hundred five thousand, six hundred five".