131261103265 has 16 divisors (see below), whose sum is σ = 162288626256. Its totient is φ = 101872512000.

The previous prime is 131261103251. The next prime is 131261103301. The reversal of 131261103265 is 562301162131.

It can be written as a sum of positive squares in 8 ways, for example, as 51772631296 + 79488471969 = 227536^2 + 281937^2 .

It is not a de Polignac number, because 131261103265 - 2²⁷ = 131126885537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2925436 + ... + 2969965.

It is an arithmetic number, because the mean of its divisors is an integer number (10143039141).

Almost surely, 2^131261103265 is an apocalyptic number.

It is an amenable number.

131261103265 is a deficient number, since it is larger than the sum of its proper divisors (31027522991).

131261103265 is an equidigital number, since it uses as much as digits as its factorization.

131261103265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5895540.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 131261103265 its reverse (562301162131), we get a palindrome (693562265396).

The spelling of 131261103265 in words is "one hundred thirty-one billion, two hundred sixty-one million, one hundred three thousand, two hundred sixty-five".