205231631255142 has 16 divisors (see below), whose sum is σ = 410585387889072. Its totient is φ = 68390189521920.

The previous prime is 205231631255111. The next prime is 205231631255213. The reversal of 205231631255142 is 241552136132502.

205231631255142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205231631255094 and 205231631255103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5088535603 + ... + 5088575934.

It is an arithmetic number, because the mean of its divisors is an integer number (25661586743067).

Almost surely, 2^{205231631255142} is an apocalyptic number.

205231631255142 is an abundant number, since it is smaller than the sum of its proper divisors (205353756633930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205231631255142 is a wasteful number, since it uses less digits than its factorization.

205231631255142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10177114903.

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 205231631255142 its reverse (241552136132502), we get a palindrome (446783767387644).

The spelling of 205231631255142 in words is "two hundred five trillion, two hundred thirty-one billion, six hundred thirty-one million, two hundred fifty-five thousand, one hundred forty-two".