240718381 has 2 divisors, whose sum is σ = 240718382. Its totient is φ = 240718380.

The previous prime is 240718327. The next prime is 240718397. The reversal of 240718381 is 183817042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239785225 + 933156 = 15485^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 240718381 - 2¹⁹ = 240194093 is a prime.

It is a super-2 number, since 2×240718381² = 115890677902522322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240718321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120359190 + 120359191.

It is an arithmetic number, because the mean of its divisors is an integer number (120359191).

Almost surely, 2^240718381 is an apocalyptic number.

It is an amenable number.

240718381 is a deficient number, since it is larger than the sum of its proper divisors (1).

240718381 is an equidigital number, since it uses as much as digits as its factorization.

240718381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 240718381 is about 15515.1017076911. The cubic root of 240718381 is about 622.0659326723.

The spelling of 240718381 in words is "two hundred forty million, seven hundred eighteen thousand, three hundred eighty-one".