40202243 has 2 divisors, whose sum is σ = 40202244. Its totient is φ = 40202242.

The previous prime is 40202219. The next prime is 40202269. The reversal of 40202243 is 34220204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40202243 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40202203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101121 + 20101122.

It is an arithmetic number, because the mean of its divisors is an integer number (20101122).

Almost surely, 2^40202243 is an apocalyptic number.

40202243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40202243 is an equidigital number, since it uses as much as digits as its factorization.

40202243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40202243 is about 6340.5238742552. The cubic root of 40202243 is about 342.5706050828.

Adding to 40202243 its reverse (34220204), we get a palindrome (74422447).

The spelling of 40202243 in words is "forty million, two hundred two thousand, two hundred forty-three".