131232311 has 4 divisors (see below), whose sum is σ = 149979792. Its totient is φ = 112484832.

The previous prime is 131232307. The next prime is 131232313. The reversal of 131232311 is 113232131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113232131 = 5987 ⋅18913.

It is a cyclic number.

It is not a de Polignac number, because 131232311 - 2² = 131232307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131232311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131232313) 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, 9373730 + ... + 9373743.

It is an arithmetic number, because the mean of its divisors is an integer number (37494948).

Almost surely, 2^131232311 is an apocalyptic number.

131232311 is a deficient number, since it is larger than the sum of its proper divisors (18747481).

131232311 is an equidigital number, since it uses as much as digits as its factorization.

131232311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18747480.

The product of its digits is 108, while the sum is 17.

The square root of 131232311 is about 11455.6672001241. The cubic root of 131232311 is about 508.1753468609.

Adding to 131232311 its reverse (113232131), we get a palindrome (244464442).

The spelling of 131232311 in words is "one hundred thirty-one million, two hundred thirty-two thousand, three hundred eleven".