204240503251 has 2 divisors, whose sum is σ = 204240503252. Its totient is φ = 204240503250.

The previous prime is 204240503227. The next prime is 204240503273. The reversal of 204240503251 is 152305042402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204240503251 - 2⁷ = 204240503123 is a prime.

It is not a weakly prime, because it can be changed into another prime (204240503651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102120251625 + 102120251626.

It is an arithmetic number, because the mean of its divisors is an integer number (102120251626).

Almost surely, 2^204240503251 is an apocalyptic number.

204240503251 is a deficient number, since it is larger than the sum of its proper divisors (1).

204240503251 is an equidigital number, since it uses as much as digits as its factorization.

204240503251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 204240503251 its reverse (152305042402), we get a palindrome (356545545653).

The spelling of 204240503251 in words is "two hundred four billion, two hundred forty million, five hundred three thousand, two hundred fifty-one".