131405227 has 2 divisors, whose sum is σ = 131405228. Its totient is φ = 131405226.

The previous prime is 131405201. The next prime is 131405251. The reversal of 131405227 is 722504131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131405227 is a prime.

It is not a weakly prime, because it can be changed into another prime (131405297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65702613 + 65702614.

It is an arithmetic number, because the mean of its divisors is an integer number (65702614).

Almost surely, 2^131405227 is an apocalyptic number.

131405227 is a deficient number, since it is larger than the sum of its proper divisors (1).

131405227 is an equidigital number, since it uses as much as digits as its factorization.

131405227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 131405227 is about 11463.2118971953. The cubic root of 131405227 is about 508.3984450741.

Adding to 131405227 its reverse (722504131), we get a palindrome (853909358).

The spelling of 131405227 in words is "one hundred thirty-one million, four hundred five thousand, two hundred twenty-seven".