131136345 has 24 divisors (see below), whose sum is σ = 232142976. Its totient is φ = 68450208.

The previous prime is 131136331. The next prime is 131136349. The reversal of 131136345 is 543631131.

131136345 is a `hidden beast` number, since 1 + 311 + 3 + 6 + 345 = 666.

It is not a de Polignac number, because 131136345 - 2¹⁹ = 130612057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131136349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28887 + ... + 33116.

It is an arithmetic number, because the mean of its divisors is an integer number (9672624).

Almost surely, 2^131136345 is an apocalyptic number.

131136345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131136345 is a deficient number, since it is larger than the sum of its proper divisors (101006631).

131136345 is a wasteful number, since it uses less digits than its factorization.

131136345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62061 (or 62058 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 131136345 is about 11451.4778522250. The cubic root of 131136345 is about 508.0514458511.

Adding to 131136345 its reverse (543631131), we get a palindrome (674767476).

The spelling of 131136345 in words is "one hundred thirty-one million, one hundred thirty-six thousand, three hundred forty-five".