251241240343 has 2 divisors, whose sum is σ = 251241240344. Its totient is φ = 251241240342.

The previous prime is 251241240311. The next prime is 251241240361. The reversal of 251241240343 is 343042142152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251241240343 - 2⁵ = 251241240311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251241240443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125620620171 + 125620620172.

It is an arithmetic number, because the mean of its divisors is an integer number (125620620172).

Almost surely, 2^251241240343 is an apocalyptic number.

251241240343 is a deficient number, since it is larger than the sum of its proper divisors (1).

251241240343 is an equidigital number, since it uses as much as digits as its factorization.

251241240343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 251241240343 its reverse (343042142152), we get a palindrome (594283382495).

The spelling of 251241240343 in words is "two hundred fifty-one billion, two hundred forty-one million, two hundred forty thousand, three hundred forty-three".