254881819 has 2 divisors, whose sum is σ = 254881820. Its totient is φ = 254881818.

The previous prime is 254881817. The next prime is 254881889. The reversal of 254881819 is 918188452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254881819 - 2¹ = 254881817 is a prime.

It is a super-2 number, since 2×254881819² = 129929483313497522, which contains 22 as substring.

Together with 254881817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (254881813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127440909 + 127440910.

It is an arithmetic number, because the mean of its divisors is an integer number (127440910).

Almost surely, 2^254881819 is an apocalyptic number.

254881819 is a deficient number, since it is larger than the sum of its proper divisors (1).

254881819 is an equidigital number, since it uses as much as digits as its factorization.

254881819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 46.

The square root of 254881819 is about 15965.0186031836. The cubic root of 254881819 is about 634.0345914512.

The spelling of 254881819 in words is "two hundred fifty-four million, eight hundred eighty-one thousand, eight hundred nineteen".