205134054142 has 4 divisors (see below), whose sum is σ = 307701081216. Its totient is φ = 102567027070.

The previous prime is 205134054119. The next prime is 205134054161. The reversal of 205134054142 is 241450431502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51283513534 + ... + 51283513537.

It is an arithmetic number, because the mean of its divisors is an integer number (76925270304).

Almost surely, 2^205134054142 is an apocalyptic number.

205134054142 is a deficient number, since it is larger than the sum of its proper divisors (102567027074).

205134054142 is a wasteful number, since it uses less digits than its factorization.

205134054142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102567027073.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 205134054142 its reverse (241450431502), we get a palindrome (446584485644).

The spelling of 205134054142 in words is "two hundred five billion, one hundred thirty-four million, fifty-four thousand, one hundred forty-two".