240404202251 has 2 divisors, whose sum is σ = 240404202252. Its totient is φ = 240404202250.

The previous prime is 240404202217. The next prime is 240404202319. The reversal of 240404202251 is 152202404042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240404202251 - 2⁶ = 240404202187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240404202251.

It is not a weakly prime, because it can be changed into another prime (240404204251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120202101125 + 120202101126.

It is an arithmetic number, because the mean of its divisors is an integer number (120202101126).

Almost surely, 2^240404202251 is an apocalyptic number.

240404202251 is a deficient number, since it is larger than the sum of its proper divisors (1).

240404202251 is an equidigital number, since it uses as much as digits as its factorization.

240404202251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 240404202251 its reverse (152202404042), we get a palindrome (392606606293).

The spelling of 240404202251 in words is "two hundred forty billion, four hundred four million, two hundred two thousand, two hundred fifty-one".