202145653 has 2 divisors, whose sum is σ = 202145654. Its totient is φ = 202145652.

The previous prime is 202145641. The next prime is 202145677. The reversal of 202145653 is 356541202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201015684 + 1129969 = 14178^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 202145653 - 2²¹ = 200048501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202145353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101072826 + 101072827.

It is an arithmetic number, because the mean of its divisors is an integer number (101072827).

Almost surely, 2^202145653 is an apocalyptic number.

It is an amenable number.

202145653 is a deficient number, since it is larger than the sum of its proper divisors (1).

202145653 is an equidigital number, since it uses as much as digits as its factorization.

202145653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 202145653 is about 14217.7935348633. The cubic root of 202145653 is about 586.8874223382.

Adding to 202145653 its reverse (356541202), we get a palindrome (558686855).

It can be divided in two parts, 2021 and 45653, that added together give a palindrome (47674).

The spelling of 202145653 in words is "two hundred two million, one hundred forty-five thousand, six hundred fifty-three".