282221981257 has 4 divisors (see below), whose sum is σ = 282256495120. Its totient is φ = 282187467396.

The previous prime is 282221981243. The next prime is 282221981299. The reversal of 282221981257 is 752189122282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 282221981257 - 2¹¹ = 282221979209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 282221981257.

It is not an unprimeable number, because it can be changed into a prime (282221981057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17244663 + ... + 17261020.

It is an arithmetic number, because the mean of its divisors is an integer number (70564123780).

Almost surely, 2^282221981257 is an apocalyptic number.

It is an amenable number.

282221981257 is a deficient number, since it is larger than the sum of its proper divisors (34513863).

282221981257 is an equidigital number, since it uses as much as digits as its factorization.

282221981257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34513862.

The product of its digits is 645120, while the sum is 49.

The spelling of 282221981257 in words is "two hundred eighty-two billion, two hundred twenty-one million, nine hundred eighty-one thousand, two hundred fifty-seven".