254540191 has 2 divisors, whose sum is σ = 254540192. Its totient is φ = 254540190.

The previous prime is 254540171. The next prime is 254540213. The reversal of 254540191 is 191045452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254540191 - 2⁵ = 254540159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254540171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127270095 + 127270096.

It is an arithmetic number, because the mean of its divisors is an integer number (127270096).

Almost surely, 2^254540191 is an apocalyptic number.

254540191 is a deficient number, since it is larger than the sum of its proper divisors (1).

254540191 is an equidigital number, since it uses as much as digits as its factorization.

254540191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 254540191 is about 15954.3157484111. The cubic root of 254540191 is about 633.7511910677.

The spelling of 254540191 in words is "two hundred fifty-four million, five hundred forty thousand, one hundred ninety-one".