265245666143321 has 2 divisors, whose sum is σ = 265245666143322. Its totient is φ = 265245666143320.

The previous prime is 265245666143261. The next prime is 265245666143377. The reversal of 265245666143321 is 123341666542562.

It is an a-pointer prime, because the next prime (265245666143377) can be obtained adding 265245666143321 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259485834142096 + 5759832001225 = 16108564^2 + 2399965^2 .

It is a cyclic number.

It is not a de Polignac number, because 265245666143321 - 2¹⁰ = 265245666142297 is a prime.

It is a super-2 number, since 2×265245666143321² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (265245666343321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132622833071660 + 132622833071661.

It is an arithmetic number, because the mean of its divisors is an integer number (132622833071661).

Almost surely, 2^{265245666143321} is an apocalyptic number.

It is an amenable number.

265245666143321 is a deficient number, since it is larger than the sum of its proper divisors (1).

265245666143321 is an equidigital number, since it uses as much as digits as its factorization.

265245666143321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37324800, while the sum is 56.

The spelling of 265245666143321 in words is "two hundred sixty-five trillion, two hundred forty-five billion, six hundred sixty-six million, one hundred forty-three thousand, three hundred twenty-one".