240313900897981 has 2 divisors, whose sum is σ = 240313900897982. Its totient is φ = 240313900897980.

The previous prime is 240313900897871. The next prime is 240313900897991. The reversal of 240313900897981 is 189798009313042.

240313900897981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228106801272025 + 12207099625956 = 15103205^2 + 3493866^2 .

It is a cyclic number.

It is not a de Polignac number, because 240313900897981 - 2⁴⁷ = 99576412542653 is a prime.

It is a super-2 number, since 2×240313900897981² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240313900897991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120156950448990 + 120156950448991.

It is an arithmetic number, because the mean of its divisors is an integer number (120156950448991).

Almost surely, 2^{240313900897981} is an apocalyptic number.

It is an amenable number.

240313900897981 is a deficient number, since it is larger than the sum of its proper divisors (1).

240313900897981 is an equidigital number, since it uses as much as digits as its factorization.

240313900897981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The spelling of 240313900897981 in words is "two hundred forty trillion, three hundred thirteen billion, nine hundred million, eight hundred ninety-seven thousand, nine hundred eighty-one".