131217227 has 2 divisors, whose sum is σ = 131217228. Its totient is φ = 131217226.

The previous prime is 131217223. The next prime is 131217253. The reversal of 131217227 is 722712131.

It is an a-pointer prime, because the next prime (131217253) can be obtained adding 131217227 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (722712131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131217227 - 2² = 131217223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131217196 and 131217205.

It is not a weakly prime, because it can be changed into another prime (131217223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65608613 + 65608614.

It is an arithmetic number, because the mean of its divisors is an integer number (65608614).

Almost surely, 2^131217227 is an apocalyptic number.

131217227 is a deficient number, since it is larger than the sum of its proper divisors (1).

131217227 is an equidigital number, since it uses as much as digits as its factorization.

131217227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 131217227 is about 11455.0088171070. The cubic root of 131217227 is about 508.1558760192.

Adding to 131217227 its reverse (722712131), we get a palindrome (853929358).

The spelling of 131217227 in words is "one hundred thirty-one million, two hundred seventeen thousand, two hundred twenty-seven".