205132513042 has 4 divisors (see below), whose sum is σ = 307698769566. Its totient is φ = 102566256520.

The previous prime is 205132512971. The next prime is 205132513043. The reversal of 205132513042 is 240315231502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 198613726921 + 6518786121 = 445661^2 + 80739^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205132513042.

It is not an unprimeable number, because it can be changed into a prime (205132513043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51283128259 + ... + 51283128262.

Almost surely, 2^205132513042 is an apocalyptic number.

205132513042 is a deficient number, since it is larger than the sum of its proper divisors (102566256524).

205132513042 is a wasteful number, since it uses less digits than its factorization.

205132513042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102566256523.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 205132513042 its reverse (240315231502), we get a palindrome (445447744544).

The spelling of 205132513042 in words is "two hundred five billion, one hundred thirty-two million, five hundred thirteen thousand, forty-two".