245521351241 has 2 divisors, whose sum is σ = 245521351242. Its totient is φ = 245521351240.

The previous prime is 245521351219. The next prime is 245521351253. The reversal of 245521351241 is 142153125542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159976800841 + 85544550400 = 399971^2 + 292480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245521351241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (245521351541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122760675620 + 122760675621.

It is an arithmetic number, because the mean of its divisors is an integer number (122760675621).

Almost surely, 2^245521351241 is an apocalyptic number.

It is an amenable number.

245521351241 is a deficient number, since it is larger than the sum of its proper divisors (1).

245521351241 is an equidigital number, since it uses as much as digits as its factorization.

245521351241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 35.

Adding to 245521351241 its reverse (142153125542), we get a palindrome (387674476783).

The spelling of 245521351241 in words is "two hundred forty-five billion, five hundred twenty-one million, three hundred fifty-one thousand, two hundred forty-one".