202142243 has 2 divisors, whose sum is σ = 202142244. Its totient is φ = 202142242.

The previous prime is 202142221. The next prime is 202142249. The reversal of 202142243 is 342241202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202142243 - 2¹² = 202138147 is a prime.

It is a super-2 number, since 2×202142243² = 81722972810142098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (202142249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101071121 + 101071122.

It is an arithmetic number, because the mean of its divisors is an integer number (101071122).

Almost surely, 2^202142243 is an apocalyptic number.

202142243 is a deficient number, since it is larger than the sum of its proper divisors (1).

202142243 is an equidigital number, since it uses as much as digits as its factorization.

202142243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 202142243 is about 14217.6736142029. The cubic root of 202142243 is about 586.8841222469.

Adding to 202142243 its reverse (342241202), we get a palindrome (544383445).

The spelling of 202142243 in words is "two hundred two million, one hundred forty-two thousand, two hundred forty-three".