240515251 has 2 divisors, whose sum is σ = 240515252. Its totient is φ = 240515250.

The previous prime is 240515227. The next prime is 240515279. The reversal of 240515251 is 152515042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240515251 - 2⁷ = 240515123 is a prime.

It is a super-3 number, since 3×240515251³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (240515221) 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, 120257625 + 120257626.

It is an arithmetic number, because the mean of its divisors is an integer number (120257626).

Almost surely, 2^240515251 is an apocalyptic number.

240515251 is a deficient number, since it is larger than the sum of its proper divisors (1).

240515251 is an equidigital number, since it uses as much as digits as its factorization.

240515251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 240515251 is about 15508.5541234507. The cubic root of 240515251 is about 621.8909068295.

The spelling of 240515251 in words is "two hundred forty million, five hundred fifteen thousand, two hundred fifty-one".