131085361 has 4 divisors (see below), whose sum is σ = 143002224. Its totient is φ = 119168500.

The previous prime is 131085359. The next prime is 131085373. The reversal of 131085361 is 163580131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131085361 - 2¹ = 131085359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131085061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5958415 + ... + 5958436.

It is an arithmetic number, because the mean of its divisors is an integer number (35750556).

Almost surely, 2^131085361 is an apocalyptic number.

131085361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131085361 is a deficient number, since it is larger than the sum of its proper divisors (11916863).

131085361 is a wasteful number, since it uses less digits than its factorization.

131085361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11916862.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 131085361 is about 11449.2515475903. The cubic root of 131085361 is about 507.9855961878.

The spelling of 131085361 in words is "one hundred thirty-one million, eighty-five thousand, three hundred sixty-one".