203105400105 has 16 divisors (see below), whose sum is σ = 325089555840. Its totient is φ = 108282574848.

The previous prime is 203105399999. The next prime is 203105400107. The reversal of 203105400105 is 501004501302.

It is not a de Polignac number, because 203105400105 - 2⁷ = 203105399977 is a prime.

It is a super-3 number, since 3×203105400105³ (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 (203105400107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2477397 + ... + 2558066.

It is an arithmetic number, because the mean of its divisors is an integer number (20318097240).

Almost surely, 2^203105400105 is an apocalyptic number.

It is an amenable number.

203105400105 is a deficient number, since it is larger than the sum of its proper divisors (121984155735).

203105400105 is a wasteful number, since it uses less digits than its factorization.

203105400105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038160.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 203105400105 its reverse (501004501302), we get a palindrome (704109901407).

The spelling of 203105400105 in words is "two hundred three billion, one hundred five million, four hundred thousand, one hundred five".