240620251 has 2 divisors, whose sum is σ = 240620252. Its totient is φ = 240620250.

The previous prime is 240620197. The next prime is 240620269. The reversal of 240620251 is 152026042.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240620251 - 2¹⁵ = 240587483 is a prime.

It is not a weakly prime, because it can be changed into another prime (240620551) 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, 120310125 + 120310126.

It is an arithmetic number, because the mean of its divisors is an integer number (120310126).

Almost surely, 2^240620251 is an apocalyptic number.

240620251 is a deficient number, since it is larger than the sum of its proper divisors (1).

240620251 is an equidigital number, since it uses as much as digits as its factorization.

240620251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 240620251 is about 15511.9389826030. The cubic root of 240620251 is about 621.9813917986.

Adding to 240620251 its reverse (152026042), we get a palindrome (392646293).

The spelling of 240620251 in words is "two hundred forty million, six hundred twenty thousand, two hundred fifty-one".