281482391 has 2 divisors, whose sum is σ = 281482392. Its totient is φ = 281482390.

The previous prime is 281482361. The next prime is 281482393. The reversal of 281482391 is 193284182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 281482391 - 2¹⁰ = 281481367 is a prime.

Together with 281482393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281482393) 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, 140741195 + 140741196.

It is an arithmetic number, because the mean of its divisors is an integer number (140741196).

Almost surely, 2^281482391 is an apocalyptic number.

281482391 is a deficient number, since it is larger than the sum of its proper divisors (1).

281482391 is an equidigital number, since it uses as much as digits as its factorization.

281482391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 281482391 is about 16777.4369615862. The cubic root of 281482391 is about 655.3657541953.

The spelling of 281482391 in words is "two hundred eighty-one million, four hundred eighty-two thousand, three hundred ninety-one".