202145505 has 32 divisors (see below), whose sum is σ = 343249920. Its totient is φ = 101365440.

The previous prime is 202145497. The next prime is 202145527. The reversal of 202145505 is 505541202.

It is a happy number.

202145505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 202145505 - 2³ = 202145497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15390 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (10726560).

Almost surely, 2^202145505 is an apocalyptic number.

It is an amenable number.

202145505 is a deficient number, since it is larger than the sum of its proper divisors (141104415).

202145505 is a wasteful number, since it uses less digits than its factorization.

202145505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 202145505 is about 14217.7883301166. The cubic root of 202145505 is about 586.8872791092.

Adding to 202145505 its reverse (505541202), we get a palindrome (707686707).

The spelling of 202145505 in words is "two hundred two million, one hundred forty-five thousand, five hundred five".