251233243 has 2 divisors, whose sum is σ = 251233244. Its totient is φ = 251233242.

The previous prime is 251233141. The next prime is 251233253. The reversal of 251233243 is 342332152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251233243 is a prime.

It is not a weakly prime, because it can be changed into another prime (251233253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125616621 + 125616622.

It is an arithmetic number, because the mean of its divisors is an integer number (125616622).

Almost surely, 2^251233243 is an apocalyptic number.

251233243 is a deficient number, since it is larger than the sum of its proper divisors (1).

251233243 is an equidigital number, since it uses as much as digits as its factorization.

251233243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 25.

The square root of 251233243 is about 15850.3388922761. The cubic root of 251233243 is about 630.9946855221.

Adding to 251233243 its reverse (342332152), we get a palindrome (593565395).

The spelling of 251233243 in words is "two hundred fifty-one million, two hundred thirty-three thousand, two hundred forty-three".