205142150051 has 4 divisors (see below), whose sum is σ = 205345463400. Its totient is φ = 204938836704.

The previous prime is 205142150039. The next prime is 205142150069. The reversal of 205142150051 is 150051241502.

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

It is a cyclic number.

It is not a de Polignac number, because 205142150051 - 2¹⁰ = 205142149027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205142150051.

It is not an unprimeable number, because it can be changed into a prime (205142050051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101655161 + ... + 101657178.

It is an arithmetic number, because the mean of its divisors is an integer number (51336365850).

Almost surely, 2^205142150051 is an apocalyptic number.

205142150051 is a deficient number, since it is larger than the sum of its proper divisors (203313349).

205142150051 is a wasteful number, since it uses less digits than its factorization.

205142150051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203313348.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 205142150051 its reverse (150051241502), we get a palindrome (355193391553).

The spelling of 205142150051 in words is "two hundred five billion, one hundred forty-two million, one hundred fifty thousand, fifty-one".