240021155513 has 2 divisors, whose sum is σ = 240021155514. Its totient is φ = 240021155512.

The previous prime is 240021155503. The next prime is 240021155527. The reversal of 240021155513 is 315551120042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225280281769 + 14740873744 = 474637^2 + 121412^2 .

It is a cyclic number.

It is not a de Polignac number, because 240021155513 - 2²⁴ = 240004378297 is a prime.

It is a super-2 number, since 2×240021155513² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (240021155503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120010577756 + 120010577757.

It is an arithmetic number, because the mean of its divisors is an integer number (120010577757).

Almost surely, 2^240021155513 is an apocalyptic number.

It is an amenable number.

240021155513 is a deficient number, since it is larger than the sum of its proper divisors (1).

240021155513 is an equidigital number, since it uses as much as digits as its factorization.

240021155513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 240021155513 its reverse (315551120042), we get a palindrome (555572275555).

The spelling of 240021155513 in words is "two hundred forty billion, twenty-one million, one hundred fifty-five thousand, five hundred thirteen".