203012145245 has 24 divisors (see below), whose sum is σ = 305187493464. Its totient is φ = 128499993216.

The previous prime is 203012145223. The next prime is 203012145367. The reversal of 203012145245 is 542541210302.

203012145245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20719011481 + 182293133764 = 143941^2 + 426958^2 .

It is not a de Polignac number, because 203012145245 - 2²⁰ = 203011096669 is a prime.

It is a super-2 number, since 2×203012145245² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31866854 + ... + 31873223.

It is an arithmetic number, because the mean of its divisors is an integer number (12716145561).

Almost surely, 2^203012145245 is an apocalyptic number.

It is an amenable number.

203012145245 is a deficient number, since it is larger than the sum of its proper divisors (102175348219).

203012145245 is a wasteful number, since it uses less digits than its factorization.

203012145245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63740109 (or 63740102 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 203012145245 its reverse (542541210302), we get a palindrome (745553355547).

The spelling of 203012145245 in words is "two hundred three billion, twelve million, one hundred forty-five thousand, two hundred forty-five".