251111125141 has 2 divisors, whose sum is σ = 251111125142. Its totient is φ = 251111125140.

The previous prime is 251111125093. The next prime is 251111125267. The reversal of 251111125141 is 141521111152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183765685041 + 67345440100 = 428679^2 + 259510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251111125141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251111125841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125555562570 + 125555562571.

It is an arithmetic number, because the mean of its divisors is an integer number (125555562571).

Almost surely, 2^251111125141 is an apocalyptic number.

It is an amenable number.

251111125141 is a deficient number, since it is larger than the sum of its proper divisors (1).

251111125141 is an equidigital number, since it uses as much as digits as its factorization.

251111125141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 25.

Adding to 251111125141 its reverse (141521111152), we get a palindrome (392632236293).

The spelling of 251111125141 in words is "two hundred fifty-one billion, one hundred eleven million, one hundred twenty-five thousand, one hundred forty-one".