245331530245421 has 2 divisors, whose sum is σ = 245331530245422. Its totient is φ = 245331530245420.

The previous prime is 245331530245387. The next prime is 245331530245517. The reversal of 245331530245421 is 124542035133542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131904535900900 + 113426994344521 = 11484970^2 + 10650211^2 .

It is a cyclic number.

It is not a de Polignac number, because 245331530245421 - 2¹⁸ = 245331529983277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245331530295421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122665765122710 + 122665765122711.

It is an arithmetic number, because the mean of its divisors is an integer number (122665765122711).

Almost surely, 2^{245331530245421} is an apocalyptic number.

It is an amenable number.

245331530245421 is a deficient number, since it is larger than the sum of its proper divisors (1).

245331530245421 is an equidigital number, since it uses as much as digits as its factorization.

245331530245421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728000, while the sum is 44.

Adding to 245331530245421 its reverse (124542035133542), we get a palindrome (369873565378963).

The spelling of 245331530245421 in words is "two hundred forty-five trillion, three hundred thirty-one billion, five hundred thirty million, two hundred forty-five thousand, four hundred twenty-one".