255045145053221 has 8 divisors (see below), whose sum is σ = 270274922429400. Its totient is φ = 240244375490560.

The previous prime is 255045145053217. The next prime is 255045145053277. The reversal of 255045145053221 is 122350541540552.

It can be written as a sum of positive squares in 4 ways, for example, as 58093050625 + 254987052002596 = 241025^2 + 15968314^2 .

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 255045145053221 - 2² = 255045145053217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255045145053211) 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, 107251952156 + ... + 107251954533.

It is an arithmetic number, because the mean of its divisors is an integer number (33784365303675).

Almost surely, 2^{255045145053221} is an apocalyptic number.

It is an amenable number.

255045145053221 is a deficient number, since it is larger than the sum of its proper divisors (15229777376179).

255045145053221 is a wasteful number, since it uses less digits than its factorization.

255045145053221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214503906759.

The product of its (nonzero) digits is 1200000, while the sum is 44.

Adding to 255045145053221 its reverse (122350541540552), we get a palindrome (377395686593773).

The spelling of 255045145053221 in words is "two hundred fifty-five trillion, forty-five billion, one hundred forty-five million, fifty-three thousand, two hundred twenty-one".