131230311 has 4 divisors (see below), whose sum is σ = 174973752. Its totient is φ = 87486872.

The previous prime is 131230303. The next prime is 131230339. The reversal of 131230311 is 113032131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131230311 - 2³ = 131230303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131230301) 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, 21871716 + ... + 21871721.

It is an arithmetic number, because the mean of its divisors is an integer number (43743438).

Almost surely, 2^131230311 is an apocalyptic number.

131230311 is a deficient number, since it is larger than the sum of its proper divisors (43743441).

131230311 is an equidigital number, since it uses as much as digits as its factorization.

131230311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43743440.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131230311 is about 11455.5799067529. The cubic root of 131230311 is about 508.1727652917.

Adding to 131230311 its reverse (113032131), we get a palindrome (244262442).

The spelling of 131230311 in words is "one hundred thirty-one million, two hundred thirty thousand, three hundred eleven".