240021323 has 2 divisors, whose sum is σ = 240021324. Its totient is φ = 240021322.

The previous prime is 240021293. The next prime is 240021329. The reversal of 240021323 is 323120042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240021323 - 2²⁴ = 223244107 is a prime.

It is a super-2 number, since 2×240021323² = 115220470989340658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240021329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120010661 + 120010662.

It is an arithmetic number, because the mean of its divisors is an integer number (120010662).

Almost surely, 2^240021323 is an apocalyptic number.

240021323 is a deficient number, since it is larger than the sum of its proper divisors (1).

240021323 is an equidigital number, since it uses as much as digits as its factorization.

240021323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 240021323 is about 15492.6215664103. The cubic root of 240021323 is about 621.4649049565.

Adding to 240021323 its reverse (323120042), we get a palindrome (563141365).

The spelling of 240021323 in words is "two hundred forty million, twenty-one thousand, three hundred twenty-three".