131236262091 has 48 divisors (see below), whose sum is σ = 230485357440. Its totient is φ = 70918536960.

The previous prime is 131236262089. The next prime is 131236262107. The reversal of 131236262091 is 190262632131.

131236262091 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 3 + 626 + 20 + 9 + 1 = 666.

It is not a de Polignac number, because 131236262091 - 2¹ = 131236262089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131236262071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2020065 + ... + 2084018.

It is an arithmetic number, because the mean of its divisors is an integer number (4801778280).

Almost surely, 2^131236262091 is an apocalyptic number.

131236262091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131236262091 is a deficient number, since it is larger than the sum of its proper divisors (99249095349).

131236262091 is a wasteful number, since it uses less digits than its factorization.

131236262091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104136 (or 4104133 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 131236262091 in words is "one hundred thirty-one billion, two hundred thirty-six million, two hundred sixty-two thousand, ninety-one".