203412545 has 16 divisors (see below), whose sum is σ = 287966208. Its totient is φ = 134982720.

The previous prime is 203412541. The next prime is 203412551. The reversal of 203412545 is 545214302.

It is a happy number.

It is not a de Polignac number, because 203412545 - 2² = 203412541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203412541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92654 + ... + 94823.

It is an arithmetic number, because the mean of its divisors is an integer number (17997888).

Almost surely, 2^203412545 is an apocalyptic number.

It is an amenable number.

203412545 is a deficient number, since it is larger than the sum of its proper divisors (84553663).

203412545 is a wasteful number, since it uses less digits than its factorization.

203412545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187520.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 203412545 is about 14262.2769921216. The cubic root of 203412545 is about 588.1109214671.

Adding to 203412545 its reverse (545214302), we get a palindrome (748626847).

The spelling of 203412545 in words is "two hundred three million, four hundred twelve thousand, five hundred forty-five".