131228313 has 8 divisors (see below), whose sum is σ = 175061376. Its totient is φ = 87440400.

The previous prime is 131228311. The next prime is 131228329. The reversal of 131228313 is 313822131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131228313 - 2¹ = 131228311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131228311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3793 + ... + 16638.

It is an arithmetic number, because the mean of its divisors is an integer number (21882672).

Almost surely, 2^131228313 is an apocalyptic number.

It is an amenable number.

131228313 is a deficient number, since it is larger than the sum of its proper divisors (43833063).

131228313 is a wasteful number, since it uses less digits than its factorization.

131228313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22575.

The product of its digits is 864, while the sum is 24.

The square root of 131228313 is about 11455.4927000108. The cubic root of 131228313 is about 508.1701862779.

The spelling of 131228313 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, three hundred thirteen".