131428317 has 4 divisors (see below), whose sum is σ = 175237760. Its totient is φ = 87618876.

The previous prime is 131428267. The next prime is 131428327. The reversal of 131428317 is 713824131.

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 131428317 - 2⁸ = 131428061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131428327) 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, 21904717 + ... + 21904722.

It is an arithmetic number, because the mean of its divisors is an integer number (43809440).

Almost surely, 2^131428317 is an apocalyptic number.

It is an amenable number.

131428317 is a deficient number, since it is larger than the sum of its proper divisors (43809443).

131428317 is an equidigital number, since it uses as much as digits as its factorization.

131428317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43809442.

The product of its digits is 4032, while the sum is 30.

The square root of 131428317 is about 11464.2189877898. The cubic root of 131428317 is about 508.4282212427.

The spelling of 131428317 in words is "one hundred thirty-one million, four hundred twenty-eight thousand, three hundred seventeen".