131307229 has 4 divisors (see below), whose sum is σ = 131685984. Its totient is φ = 130928476.

The previous prime is 131307179. The next prime is 131307247. The reversal of 131307229 is 922703131.

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 131307229 - 2¹⁵ = 131274461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131307197 and 131307206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131307629) 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, 188857 + ... + 189550.

It is an arithmetic number, because the mean of its divisors is an integer number (32921496).

Almost surely, 2^131307229 is an apocalyptic number.

It is an amenable number.

131307229 is a deficient number, since it is larger than the sum of its proper divisors (378755).

131307229 is an equidigital number, since it uses as much as digits as its factorization.

131307229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378754.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 131307229 is about 11458.9366435110. The cubic root of 131307229 is about 508.2720309724.

The spelling of 131307229 in words is "one hundred thirty-one million, three hundred seven thousand, two hundred twenty-nine".