245523660251 has 2 divisors, whose sum is σ = 245523660252. Its totient is φ = 245523660250.

The previous prime is 245523660241. The next prime is 245523660253. The reversal of 245523660251 is 152066325542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245523660251 is a prime.

Together with 245523660253, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 245523660199 and 245523660208.

It is not a weakly prime, because it can be changed into another prime (245523660253) 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, 122761830125 + 122761830126.

It is an arithmetic number, because the mean of its divisors is an integer number (122761830126).

Almost surely, 2^245523660251 is an apocalyptic number.

245523660251 is a deficient number, since it is larger than the sum of its proper divisors (1).

245523660251 is an equidigital number, since it uses as much as digits as its factorization.

245523660251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 245523660251 its reverse (152066325542), we get a palindrome (397589985793).

The spelling of 245523660251 in words is "two hundred forty-five billion, five hundred twenty-three million, six hundred sixty thousand, two hundred fifty-one".