240344261 has 2 divisors, whose sum is σ = 240344262. Its totient is φ = 240344260.

The previous prime is 240344213. The next prime is 240344287. The reversal of 240344261 is 162443042.

It is an a-pointer prime, because the next prime (240344287) can be obtained adding 240344261 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166281025 + 74063236 = 12895^2 + 8606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240344261 is a prime.

It is a super-2 number, since 2×240344261² = 115530727591272242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240344261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240344161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120172130 + 120172131.

It is an arithmetic number, because the mean of its divisors is an integer number (120172131).

Almost surely, 2^240344261 is an apocalyptic number.

It is an amenable number.

240344261 is a deficient number, since it is larger than the sum of its proper divisors (1).

240344261 is an equidigital number, since it uses as much as digits as its factorization.

240344261 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 26.

The square root of 240344261 is about 15503.0403792288. The cubic root of 240344261 is about 621.7434978327.

It can be divided in two parts, 2403 and 44261, that added together give a palindrome (46664).

The spelling of 240344261 in words is "two hundred forty million, three hundred forty-four thousand, two hundred sixty-one".