240623281 has 2 divisors, whose sum is σ = 240623282. Its totient is φ = 240623280.

The previous prime is 240623269. The next prime is 240623303. The reversal of 240623281 is 182326042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230280625 + 10342656 = 15175^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 240623281 - 2⁵ = 240623249 is a prime.

It is a super-2 number, since 2×240623281² = 115799126718409922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (240623231) 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, 120311640 + 120311641.

It is an arithmetic number, because the mean of its divisors is an integer number (120311641).

Almost surely, 2^240623281 is an apocalyptic number.

It is an amenable number.

240623281 is a deficient number, since it is larger than the sum of its proper divisors (1).

240623281 is an equidigital number, since it uses as much as digits as its factorization.

240623281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 240623281 is about 15512.0366490026. The cubic root of 240623281 is about 621.9840025455.

The spelling of 240623281 in words is "two hundred forty million, six hundred twenty-three thousand, two hundred eighty-one".