131693285 has 24 divisors (see below), whose sum is σ = 168552576. Its totient is φ = 98572320.

The previous prime is 131693281. The next prime is 131693293. The reversal of 131693285 is 582396131.

It is a happy number.

It is not a de Polignac number, because 131693285 - 2² = 131693281 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131693281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1036892 + ... + 1037018.

It is an arithmetic number, because the mean of its divisors is an integer number (7023024).

Almost surely, 2^131693285 is an apocalyptic number.

It is an amenable number.

131693285 is a deficient number, since it is larger than the sum of its proper divisors (36859291).

131693285 is an equidigital number, since it uses as much as digits as its factorization.

131693285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 226 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 131693285 is about 11475.7694731116. The cubic root of 131693285 is about 508.7696666288.

The spelling of 131693285 in words is "one hundred thirty-one million, six hundred ninety-three thousand, two hundred eighty-five".