263341553 has 2 divisors, whose sum is σ = 263341554. Its totient is φ = 263341552.

The previous prime is 263341511. The next prime is 263341567. The reversal of 263341553 is 355143362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262991089 + 350464 = 16217^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 263341553 - 2¹⁴ = 263325169 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (263341753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131670776 + 131670777.

It is an arithmetic number, because the mean of its divisors is an integer number (131670777).

Almost surely, 2^263341553 is an apocalyptic number.

It is an amenable number.

263341553 is a deficient number, since it is larger than the sum of its proper divisors (1).

263341553 is an equidigital number, since it uses as much as digits as its factorization.

263341553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 32.

The square root of 263341553 is about 16227.8018536091. The cubic root of 263341553 is about 640.9730908362.

The spelling of 263341553 in words is "two hundred sixty-three million, three hundred forty-one thousand, five hundred fifty-three".