203075145 has 96 divisors (see below), whose sum is σ = 438407424. Its totient is φ = 84672000.

The previous prime is 203075143. The next prime is 203075153. The reversal of 203075145 is 541570302.

It is a happy number.

It is not a de Polignac number, because 203075145 - 2¹ = 203075143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203075143) 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 95 ways as a sum of consecutive naturals, for example, 413350 + ... + 413840.

It is an arithmetic number, because the mean of its divisors is an integer number (4566744).

Almost surely, 2^203075145 is an apocalyptic number.

It is an amenable number.

203075145 is an abundant number, since it is smaller than the sum of its proper divisors (235332279).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203075145 is a wasteful number, since it uses less digits than its factorization.

203075145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 203075145 is about 14250.4436773035. The cubic root of 203075145 is about 587.7855753629.

It can be divided in two parts, 20307 and 5145, that added together give a palindrome (25452).

The spelling of 203075145 in words is "two hundred three million, seventy-five thousand, one hundred forty-five".