205100030051 has 12 divisors (see below), whose sum is σ = 239627621520. Its totient is φ = 175032330480.

The previous prime is 205100030021. The next prime is 205100030159. The reversal of 205100030051 is 150030001502.

It is not a de Polignac number, because 205100030051 - 2¹⁸ = 205099767907 is a prime.

It is a super-3 number, since 3×205100030051³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (205100030021) 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, 9127895 + ... + 9150336.

It is an arithmetic number, because the mean of its divisors is an integer number (19968968460).

Almost surely, 2^205100030051 is an apocalyptic number.

205100030051 is a deficient number, since it is larger than the sum of its proper divisors (34527591469).

205100030051 is a wasteful number, since it uses less digits than its factorization.

205100030051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18278474 (or 18278467 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

Adding to 205100030051 its reverse (150030001502), we get a palindrome (355130031553).

The spelling of 205100030051 in words is "two hundred five billion, one hundred million, thirty thousand, fifty-one".