131454221 has 2 divisors, whose sum is σ = 131454222. Its totient is φ = 131454220.

The previous prime is 131454181. The next prime is 131454247. The reversal of 131454221 is 122454131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 57304900 = 8611^2 + 7570^2 .

It is an emirp because it is prime and its reverse (122454131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131454221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131454721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65727110 + 65727111.

It is an arithmetic number, because the mean of its divisors is an integer number (65727111).

Almost surely, 2^131454221 is an apocalyptic number.

It is an amenable number.

131454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

131454221 is an equidigital number, since it uses as much as digits as its factorization.

131454221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 131454221 is about 11465.3487081728. The cubic root of 131454221 is about 508.4616221104.

The spelling of 131454221 in words is "one hundred thirty-one million, four hundred fifty-four thousand, two hundred twenty-one".