205122155130 has 24 divisors (see below), whose sum is σ = 533317603572. Its totient is φ = 54699241344.

The previous prime is 205122155107. The next prime is 205122155137. The reversal of 205122155130 is 31551221502.

205122155130 is a `hidden beast` number, since 2 + 0 + 512 + 2 + 15 + 5 + 130 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 200751490809 + 4370664321 = 448053^2 + 66111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 205122155094 and 205122155103.

It is not an unprimeable number, because it can be changed into a prime (205122155137) 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, 1139567439 + ... + 1139567618.

Almost surely, 2^205122155130 is an apocalyptic number.

205122155130 is an abundant number, since it is smaller than the sum of its proper divisors (328195448442).

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

205122155130 is a wasteful number, since it uses less digits than its factorization.

205122155130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2279135070 (or 2279135067 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 205122155130 its reverse (31551221502), we get a palindrome (236673376632).

The spelling of 205122155130 in words is "two hundred five billion, one hundred twenty-two million, one hundred fifty-five thousand, one hundred thirty".