203116145 has 8 divisors (see below), whose sum is σ = 252144360. Its totient is φ = 156889600.

The previous prime is 203116141. The next prime is 203116169. The reversal of 203116145 is 541611302.

203116145 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 25240576 + 177875569 = 5024^2 + 13337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203116145 - 2² = 203116141 is a prime.

It is a super-2 number, since 2×203116145² = 82512336719322050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203116145.

It is not an unprimeable number, because it can be changed into a prime (203116141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700256 + ... + 700545.

It is an arithmetic number, because the mean of its divisors is an integer number (31518045).

Almost surely, 2^203116145 is an apocalyptic number.

It is an amenable number.

203116145 is a deficient number, since it is larger than the sum of its proper divisors (49028215).

203116145 is a wasteful number, since it uses less digits than its factorization.

203116145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400835.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 203116145 is about 14251.8821564031. The cubic root of 203116145 is about 587.8251298292.

Adding to 203116145 its reverse (541611302), we get a palindrome (744727447).

The spelling of 203116145 in words is "two hundred three million, one hundred sixteen thousand, one hundred forty-five".