40240223 has 2 divisors, whose sum is σ = 40240224. Its totient is φ = 40240222.

The previous prime is 40240181. The next prime is 40240237. The reversal of 40240223 is 32204204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40240223 - 2¹⁸ = 39978079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40240243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120111 + 20120112.

It is an arithmetic number, because the mean of its divisors is an integer number (20120112).

Almost surely, 2^40240223 is an apocalyptic number.

40240223 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240223 is an equidigital number, since it uses as much as digits as its factorization.

40240223 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 40240223 is about 6343.5181878828. The cubic root of 40240223 is about 342.6784492854.

Adding to 40240223 its reverse (32204204), we get a palindrome (72444427).

The spelling of 40240223 in words is "forty million, two hundred forty thousand, two hundred twenty-three".