131097285 has 96 divisors (see below), whose sum is σ = 272668032. Its totient is φ = 59719680.

The previous prime is 131097271. The next prime is 131097287. The reversal of 131097285 is 582790131.

It is not a de Polignac number, because 131097285 - 2⁶ = 131097221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131097287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 226917 + ... + 227493.

It is an arithmetic number, because the mean of its divisors is an integer number (2840292).

Almost surely, 2^131097285 is an apocalyptic number.

131097285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131097285 is an abundant number, since it is smaller than the sum of its proper divisors (141570747).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131097285 is a wasteful number, since it uses less digits than its factorization.

131097285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 131097285 is about 11449.7722684777. The cubic root of 131097285 is about 508.0009984584. Note that the first 3 decimals are identical.

The spelling of 131097285 in words is "one hundred thirty-one million, ninety-seven thousand, two hundred eighty-five".