251043223133 has 2 divisors, whose sum is σ = 251043223134. Its totient is φ = 251043223132.

The previous prime is 251043223117. The next prime is 251043223183. The reversal of 251043223133 is 331322340152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234951539524 + 16091683609 = 484718^2 + 126853^2 .

It is a cyclic number.

It is not a de Polignac number, because 251043223133 - 2⁴ = 251043223117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251043223096 and 251043223105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251043223183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125521611566 + 125521611567.

It is an arithmetic number, because the mean of its divisors is an integer number (125521611567).

Almost surely, 2^251043223133 is an apocalyptic number.

It is an amenable number.

251043223133 is a deficient number, since it is larger than the sum of its proper divisors (1).

251043223133 is an equidigital number, since it uses as much as digits as its factorization.

251043223133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 251043223133 its reverse (331322340152), we get a palindrome (582365563285).

The spelling of 251043223133 in words is "two hundred fifty-one billion, forty-three million, two hundred twenty-three thousand, one hundred thirty-three".