131228513 has 8 divisors (see below), whose sum is σ = 142261056. Its totient is φ = 120330000.

The previous prime is 131228443. The next prime is 131228527. The reversal of 131228513 is 315822131.

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

It is a cyclic number.

It is not a de Polignac number, because 131228513 - 2¹² = 131224417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131228533) 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, 31463 + ... + 35388.

It is an arithmetic number, because the mean of its divisors is an integer number (17782632).

Almost surely, 2^131228513 is an apocalyptic number.

131228513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131228513 is a deficient number, since it is larger than the sum of its proper divisors (11032543).

131228513 is a wasteful number, since it uses less digits than its factorization.

131228513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67015.

The product of its digits is 1440, while the sum is 26.

The square root of 131228513 is about 11455.5014294443. The cubic root of 131228513 is about 508.1704444387.

The spelling of 131228513 in words is "one hundred thirty-one million, two hundred twenty-eight thousand, five hundred thirteen".