265140300315421 has 2 divisors, whose sum is σ = 265140300315422. Its totient is φ = 265140300315420.

The previous prime is 265140300315391. The next prime is 265140300315437. The reversal of 265140300315421 is 124513003041562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208600653404196 + 56539646911225 = 14443014^2 + 7519285^2 .

It is a cyclic number.

It is not a de Polignac number, because 265140300315421 - 2¹¹ = 265140300313373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265140300310421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132570150157710 + 132570150157711.

It is an arithmetic number, because the mean of its divisors is an integer number (132570150157711).

Almost surely, 2^{265140300315421} is an apocalyptic number.

It is an amenable number.

265140300315421 is a deficient number, since it is larger than the sum of its proper divisors (1).

265140300315421 is an equidigital number, since it uses as much as digits as its factorization.

265140300315421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 265140300315421 its reverse (124513003041562), we get a palindrome (389653303356983).

The spelling of 265140300315421 in words is "two hundred sixty-five trillion, one hundred forty billion, three hundred million, three hundred fifteen thousand, four hundred twenty-one".