240351281 has 2 divisors, whose sum is σ = 240351282. Its totient is φ = 240351280.

The previous prime is 240351257. The next prime is 240351299. The reversal of 240351281 is 182153042.

240351281 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., 212430625 + 27920656 = 14575^2 + 5284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240351281 is a prime.

It is a super-2 number, since 2×240351281² = 115537476556681922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240351281.

It is not a weakly prime, because it can be changed into another prime (240351481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120175640 + 120175641.

It is an arithmetic number, because the mean of its divisors is an integer number (120175641).

Almost surely, 2^240351281 is an apocalyptic number.

It is an amenable number.

240351281 is a deficient number, since it is larger than the sum of its proper divisors (1).

240351281 is an equidigital number, since it uses as much as digits as its factorization.

240351281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 240351281 is about 15503.2667847780. The cubic root of 240351281 is about 621.7495510898.

The spelling of 240351281 in words is "two hundred forty million, three hundred fifty-one thousand, two hundred eighty-one".