281779243231 has 2 divisors, whose sum is σ = 281779243232. Its totient is φ = 281779243230.

The previous prime is 281779243199. The next prime is 281779243271. The reversal of 281779243231 is 132342977182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 281779243231 - 2⁵ = 281779243199 is a prime.

It is a super-2 number, since 2×281779243231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281779243271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140889621615 + 140889621616.

It is an arithmetic number, because the mean of its divisors is an integer number (140889621616).

Almost surely, 2^281779243231 is an apocalyptic number.

281779243231 is a deficient number, since it is larger than the sum of its proper divisors (1).

281779243231 is an equidigital number, since it uses as much as digits as its factorization.

281779243231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The spelling of 281779243231 in words is "two hundred eighty-one billion, seven hundred seventy-nine million, two hundred forty-three thousand, two hundred thirty-one".