40242263 has 2 divisors, whose sum is σ = 40242264. Its totient is φ = 40242262.

The previous prime is 40242259. The next prime is 40242287. The reversal of 40242263 is 36224204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40242263 - 2² = 40242259 is a prime.

It is a super-2 number, since 2×40242263² = 3238879462722338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40242233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121131 + 20121132.

It is an arithmetic number, because the mean of its divisors is an integer number (20121132).

Almost surely, 2^40242263 is an apocalyptic number.

40242263 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242263 is an equidigital number, since it uses as much as digits as its factorization.

40242263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 40242263 is about 6343.6789798980. The cubic root of 40242263 is about 342.6842399444.

Adding to 40242263 its reverse (36224204), we get a palindrome (76466467).

The spelling of 40242263 in words is "forty million, two hundred forty-two thousand, two hundred sixty-three".