255631503205 has 12 divisors (see below), whose sum is σ = 332169694020. Its totient is φ = 188774032512.

The previous prime is 255631503203. The next prime is 255631503223. The reversal of 255631503205 is 502305136552.

It can be written as a sum of positive squares in 6 ways, for example, as 104871697921 + 150759805284 = 323839^2 + 388278^2 .

It is not a de Polignac number, because 255631503205 - 2¹ = 255631503203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255631503203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151260400 + ... + 151262089.

It is an arithmetic number, because the mean of its divisors is an integer number (27680807835).

Almost surely, 2^255631503205 is an apocalyptic number.

It is an amenable number.

255631503205 is a deficient number, since it is larger than the sum of its proper divisors (76538190815).

255631503205 is a wasteful number, since it uses less digits than its factorization.

255631503205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302522520 (or 302522507 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 37.

Adding to 255631503205 its reverse (502305136552), we get a palindrome (757936639757).

The spelling of 255631503205 in words is "two hundred fifty-five billion, six hundred thirty-one million, five hundred three thousand, two hundred five".