240204239981 has 2 divisors, whose sum is σ = 240204239982. Its totient is φ = 240204239980.

The previous prime is 240204239953. The next prime is 240204240061. The reversal of 240204239981 is 189932402042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120923803081 + 119280436900 = 347741^2 + 345370^2 .

It is a cyclic number.

It is not a de Polignac number, because 240204239981 - 2³⁴ = 223024370797 is a prime.

It is a super-2 number, since 2×240204239981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240204239911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120102119990 + 120102119991.

It is an arithmetic number, because the mean of its divisors is an integer number (120102119991).

Almost surely, 2^240204239981 is an apocalyptic number.

It is an amenable number.

240204239981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240204239981 is an equidigital number, since it uses as much as digits as its factorization.

240204239981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 240204239981 in words is "two hundred forty billion, two hundred four million, two hundred thirty-nine thousand, nine hundred eighty-one".