255405220203501 has 6 divisors (see below), whose sum is σ = 368918651405070. Its totient is φ = 170270146802328.

The previous prime is 255405220203491. The next prime is 255405220203587. The reversal of 255405220203501 is 105302022504552.

255405220203501 is a `hidden beast` number, since 2 + 5 + 5 + 405 + 220 + 20 + 3 + 5 + 0 + 1 = 666.

255405220203501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 154718023644900 + 100687196558601 = 12438570^2 + 10034301^2 .

It is not a de Polignac number, because 255405220203501 - 2¹⁹ = 255405219679213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255405220203901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14189178900186 + ... + 14189178900203.

It is an arithmetic number, because the mean of its divisors is an integer number (61486441900845).

Almost surely, 2^{255405220203501} is an apocalyptic number.

It is an amenable number.

255405220203501 is a deficient number, since it is larger than the sum of its proper divisors (113513431201569).

255405220203501 is a wasteful number, since it uses less digits than its factorization.

255405220203501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28378357800395 (or 28378357800392 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 255405220203501 in words is "two hundred fifty-five trillion, four hundred five billion, two hundred twenty million, two hundred three thousand, five hundred one".