131320285 has 4 divisors (see below), whose sum is σ = 157584348. Its totient is φ = 105056224.

The previous prime is 131320261. The next prime is 131320297. The reversal of 131320285 is 582023131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 582023131 = 823 ⋅707197.

It can be written as a sum of positive squares in 2 ways, for example, as 98624761 + 32695524 = 9931^2 + 5718^2 .

It is a cyclic number.

It is not a de Polignac number, because 131320285 - 2¹¹ = 131318237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13132024 + ... + 13132033.

It is an arithmetic number, because the mean of its divisors is an integer number (39396087).

Almost surely, 2^131320285 is an apocalyptic number.

It is an amenable number.

131320285 is a deficient number, since it is larger than the sum of its proper divisors (26264063).

131320285 is an equidigital number, since it uses as much as digits as its factorization.

131320285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26264062.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 131320285 is about 11459.5063157188. The cubic root of 131320285 is about 508.2888764011.

The spelling of 131320285 in words is "one hundred thirty-one million, three hundred twenty thousand, two hundred eighty-five".