131303857 has 4 divisors (see below), whose sum is σ = 131555440. Its totient is φ = 131052276.

The previous prime is 131303827. The next prime is 131303899. The reversal of 131303857 is 758303131.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 131303857 - 2⁷ = 131303729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131303807) 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, 125007 + ... + 126052.

It is an arithmetic number, because the mean of its divisors is an integer number (32888860).

Almost surely, 2^131303857 is an apocalyptic number.

It is an amenable number.

131303857 is a deficient number, since it is larger than the sum of its proper divisors (251583).

131303857 is an equidigital number, since it uses as much as digits as its factorization.

131303857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251582.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 131303857 is about 11458.7895084952. The cubic root of 131303857 is about 508.2676800874.

Adding to 131303857 its reverse (758303131), we get a palindrome (889606988).

The spelling of 131303857 in words is "one hundred thirty-one million, three hundred three thousand, eight hundred fifty-seven".