245421631243 has 2 divisors, whose sum is σ = 245421631244. Its totient is φ = 245421631242.

The previous prime is 245421631229. The next prime is 245421631253. The reversal of 245421631243 is 342136124542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245421631243 - 2⁵ = 245421631211 is a prime.

It is not a weakly prime, because it can be changed into another prime (245421631253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122710815621 + 122710815622.

It is an arithmetic number, because the mean of its divisors is an integer number (122710815622).

Almost surely, 2^245421631243 is an apocalyptic number.

245421631243 is a deficient number, since it is larger than the sum of its proper divisors (1).

245421631243 is an equidigital number, since it uses as much as digits as its factorization.

245421631243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 37.

Adding to 245421631243 its reverse (342136124542), we get a palindrome (587557755785).

The spelling of 245421631243 in words is "two hundred forty-five billion, four hundred twenty-one million, six hundred thirty-one thousand, two hundred forty-three".