251111142343 has 2 divisors, whose sum is σ = 251111142344. Its totient is φ = 251111142342.

The previous prime is 251111142313. The next prime is 251111142367. The reversal of 251111142343 is 343241111152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251111142343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251111142313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125555571171 + 125555571172.

It is an arithmetic number, because the mean of its divisors is an integer number (125555571172).

Almost surely, 2^251111142343 is an apocalyptic number.

251111142343 is a deficient number, since it is larger than the sum of its proper divisors (1).

251111142343 is an equidigital number, since it uses as much as digits as its factorization.

251111142343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

Adding to 251111142343 its reverse (343241111152), we get a palindrome (594352253495).

The spelling of 251111142343 in words is "two hundred fifty-one billion, one hundred eleven million, one hundred forty-two thousand, three hundred forty-three".