265216543 has 2 divisors, whose sum is σ = 265216544. Its totient is φ = 265216542.

The previous prime is 265216531. The next prime is 265216559. The reversal of 265216543 is 345612562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265216543 - 2¹³ = 265208351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 265216499 and 265216508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265216583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132608271 + 132608272.

It is an arithmetic number, because the mean of its divisors is an integer number (132608272).

Almost surely, 2^265216543 is an apocalyptic number.

265216543 is a deficient number, since it is larger than the sum of its proper divisors (1).

265216543 is an equidigital number, since it uses as much as digits as its factorization.

265216543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 34.

The square root of 265216543 is about 16285.4703033102. The cubic root of 265216543 is about 642.4907359361.

The spelling of 265216543 in words is "two hundred sixty-five million, two hundred sixteen thousand, five hundred forty-three".