240222581 has 2 divisors, whose sum is σ = 240222582. Its totient is φ = 240222580.

The previous prime is 240222551. The next prime is 240222583. The reversal of 240222581 is 185222042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120670225 + 119552356 = 10985^2 + 10934^2 .

It is a cyclic number.

It is not a de Polignac number, because 240222581 - 2⁶ = 240222517 is a prime.

It is a super-2 number, since 2×240222581² = 115413776844603122, which contains 22 as substring.

Together with 240222583, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_13173164 and since 240222581 and 13173164 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240222581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240222583) 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, 120111290 + 120111291.

It is an arithmetic number, because the mean of its divisors is an integer number (120111291).

Almost surely, 2^240222581 is an apocalyptic number.

It is an amenable number.

240222581 is a deficient number, since it is larger than the sum of its proper divisors (1).

240222581 is an equidigital number, since it uses as much as digits as its factorization.

240222581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 240222581 is about 15499.1154908917. The cubic root of 240222581 is about 621.6385559751.

The spelling of 240222581 in words is "two hundred forty million, two hundred twenty-two thousand, five hundred eighty-one".