281217240823655 has 32 divisors (see below), whose sum is σ = 341168163706944. Its totient is φ = 222505295855616.

The previous prime is 281217240823579. The next prime is 281217240823657. The reversal of 281217240823655 is 556328042712182.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281217240823655 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 281217240823655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281217240823657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5625107339 + ... + 5625157331.

It is an arithmetic number, because the mean of its divisors is an integer number (10661505115842).

Almost surely, 2^{281217240823655} is an apocalyptic number.

281217240823655 is a deficient number, since it is larger than the sum of its proper divisors (59950922883289).

281217240823655 is a wasteful number, since it uses less digits than its factorization.

281217240823655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57635.

The product of its (nonzero) digits is 12902400, while the sum is 56.

The spelling of 281217240823655 in words is "two hundred eighty-one trillion, two hundred seventeen billion, two hundred forty million, eight hundred twenty-three thousand, six hundred fifty-five".