202140530465 has 4 divisors (see below), whose sum is σ = 242568636564. Its totient is φ = 161712424368.

The previous prime is 202140530419. The next prime is 202140530489. The reversal of 202140530465 is 564035041202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157381204369 + 44759326096 = 396713^2 + 211564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202140530465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20214053042 + ... + 20214053051.

It is an arithmetic number, because the mean of its divisors is an integer number (60642159141).

Almost surely, 2^202140530465 is an apocalyptic number.

It is an amenable number.

202140530465 is a deficient number, since it is larger than the sum of its proper divisors (40428106099).

202140530465 is an equidigital number, since it uses as much as digits as its factorization.

202140530465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40428106098.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 202140530465 its reverse (564035041202), we get a palindrome (766175571667).

The spelling of 202140530465 in words is "two hundred two billion, one hundred forty million, five hundred thirty thousand, four hundred sixty-five".