202140581 has 2 divisors, whose sum is σ = 202140582. Its totient is φ = 202140580.

The previous prime is 202140511. The next prime is 202140593. The reversal of 202140581 is 185041202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158130625 + 44009956 = 12575^2 + 6634^2 .

It is a cyclic number.

It is not a de Polignac number, because 202140581 - 2¹⁰ = 202139557 is a prime.

It is a super-2 number, since 2×202140581² = 81721628974035122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202140511) 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 as a sum of consecutive naturals, namely, 101070290 + 101070291.

It is an arithmetic number, because the mean of its divisors is an integer number (101070291).

Almost surely, 2^202140581 is an apocalyptic number.

It is an amenable number.

202140581 is a deficient number, since it is larger than the sum of its proper divisors (1).

202140581 is an equidigital number, since it uses as much as digits as its factorization.

202140581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 202140581 is about 14217.6151657020. The cubic root of 202140581 is about 586.8825138018.

Adding to 202140581 its reverse (185041202), we get a palindrome (387181783).

The spelling of 202140581 in words is "two hundred two million, one hundred forty thousand, five hundred eighty-one".