203105415345 has 64 divisors (see below), whose sum is σ = 373577326080. Its totient is φ = 92302737408.

The previous prime is 203105415311. The next prime is 203105415347. The reversal of 203105415345 is 543514501302.

It is not a de Polignac number, because 203105415345 - 2⁸ = 203105415089 is a prime.

It is a super-2 number, since 2×203105415345² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203105415347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40872021 + ... + 40876989.

It is an arithmetic number, because the mean of its divisors is an integer number (5837145720).

Almost surely, 2^203105415345 is an apocalyptic number.

It is an amenable number.

203105415345 is a deficient number, since it is larger than the sum of its proper divisors (170471910735).

203105415345 is a wasteful number, since it uses less digits than its factorization.

203105415345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 203105415345 its reverse (543514501302), we get a palindrome (746619916647).

The spelling of 203105415345 in words is "two hundred three billion, one hundred five million, four hundred fifteen thousand, three hundred forty-five".