263356081 has 2 divisors, whose sum is σ = 263356082. Its totient is φ = 263356080.

The previous prime is 263356057. The next prime is 263356097. The reversal of 263356081 is 180653362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261954225 + 1401856 = 16185^2 + 1184^2 .

It is a cyclic number.

It is not a de Polignac number, because 263356081 - 2¹¹ = 263354033 is a prime.

It is a super-2 number, since 2×263356081² = 138712850799357122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (263356021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131678040 + 131678041.

It is an arithmetic number, because the mean of its divisors is an integer number (131678041).

Almost surely, 2^263356081 is an apocalyptic number.

It is an amenable number.

263356081 is a deficient number, since it is larger than the sum of its proper divisors (1).

263356081 is an equidigital number, since it uses as much as digits as its factorization.

263356081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 263356081 is about 16228.2494742964. The cubic root of 263356081 is about 640.9848776655.

The spelling of 263356081 in words is "two hundred sixty-three million, three hundred fifty-six thousand, eighty-one".