131211347 has 2 divisors, whose sum is σ = 131211348. Its totient is φ = 131211346.

The previous prime is 131211323. The next prime is 131211349. The reversal of 131211347 is 743112131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (743112131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131211347 - 2²² = 127017043 is a prime.

Together with 131211349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131211349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605673 + 65605674.

It is an arithmetic number, because the mean of its divisors is an integer number (65605674).

Almost surely, 2^131211347 is an apocalyptic number.

131211347 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211347 is an equidigital number, since it uses as much as digits as its factorization.

131211347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 131211347 is about 11454.7521579474. The cubic root of 131211347 is about 508.1482855495.

Adding to 131211347 its reverse (743112131), we get a palindrome (874323478).

The spelling of 131211347 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred forty-seven".