203105104451 has 4 divisors (see below), whose sum is σ = 203207736600. Its totient is φ = 203002472304.

The previous prime is 203105104429. The next prime is 203105104481. The reversal of 203105104451 is 154401501302.

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 203105104451 - 2²² = 203100910147 is a prime.

It is a super-2 number, since 2×203105104451² (a number of 23 digits) contains 22 as substring.

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 203105104451.

It is not an unprimeable number, because it can be changed into a prime (203105104421) 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 3 ways as a sum of consecutive naturals, for example, 51313106 + ... + 51317063.

It is an arithmetic number, because the mean of its divisors is an integer number (50801934150).

Almost surely, 2^203105104451 is an apocalyptic number.

203105104451 is a deficient number, since it is larger than the sum of its proper divisors (102632149).

203105104451 is a wasteful number, since it uses less digits than its factorization.

203105104451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102632148.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 203105104451 its reverse (154401501302), we get a palindrome (357506605753).

The spelling of 203105104451 in words is "two hundred three billion, one hundred five million, one hundred four thousand, four hundred fifty-one".