255117200221 has 8 divisors (see below), whose sum is σ = 275556861944. Its totient is φ = 234794004480.

The previous prime is 255117200201. The next prime is 255117200231. The reversal of 255117200221 is 122002711552.

It can be written as a sum of positive squares in 4 ways, for example, as 9334264996 + 245782935225 = 96614^2 + 495765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255117200221 - 2⁹ = 255117199709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255117200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255117200201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29111940 + ... + 29120701.

It is an arithmetic number, because the mean of its divisors is an integer number (34444607743).

Almost surely, 2^255117200221 is an apocalyptic number.

It is an amenable number.

255117200221 is a deficient number, since it is larger than the sum of its proper divisors (20439661723).

255117200221 is a wasteful number, since it uses less digits than its factorization.

255117200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58232991.

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 255117200221 its reverse (122002711552), we get a palindrome (377119911773).

The spelling of 255117200221 in words is "two hundred fifty-five billion, one hundred seventeen million, two hundred thousand, two hundred twenty-one".