40033243 has 2 divisors, whose sum is σ = 40033244. Its totient is φ = 40033242.

The previous prime is 40033229. The next prime is 40033277. The reversal of 40033243 is 34233004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40033243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40033243.

It is not a weakly prime, because it can be changed into another prime (40033843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20016621 + 20016622.

It is an arithmetic number, because the mean of its divisors is an integer number (20016622).

Almost surely, 2^40033243 is an apocalyptic number.

40033243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40033243 is an equidigital number, since it uses as much as digits as its factorization.

40033243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 40033243 is about 6327.1828644350. The cubic root of 40033243 is about 342.0899043191.

Adding to 40033243 its reverse (34233004), we get a palindrome (74266247).

The spelling of 40033243 in words is "forty million, thirty-three thousand, two hundred forty-three".