251043223 has 2 divisors, whose sum is σ = 251043224. Its totient is φ = 251043222.

The previous prime is 251043209. The next prime is 251043253. The reversal of 251043223 is 322340152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251043223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251043194 and 251043203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251043203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125521611 + 125521612.

It is an arithmetic number, because the mean of its divisors is an integer number (125521612).

Almost surely, 2^251043223 is an apocalyptic number.

251043223 is a deficient number, since it is larger than the sum of its proper divisors (1).

251043223 is an equidigital number, since it uses as much as digits as its factorization.

251043223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 251043223 is about 15844.3435648183. The cubic root of 251043223 is about 630.8355613413.

Adding to 251043223 its reverse (322340152), we get a palindrome (573383375).

The spelling of 251043223 in words is "two hundred fifty-one million, forty-three thousand, two hundred twenty-three".