263140243 has 4 divisors (see below), whose sum is σ = 263284560. Its totient is φ = 262995928.

The previous prime is 263140219. The next prime is 263140247. The reversal of 263140243 is 342041362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263140243 - 2⁹ = 263139731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263140247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69388 + ... + 73081.

It is an arithmetic number, because the mean of its divisors is an integer number (65821140).

Almost surely, 2^263140243 is an apocalyptic number.

263140243 is a deficient number, since it is larger than the sum of its proper divisors (144317).

263140243 is a wasteful number, since it uses less digits than its factorization.

263140243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144316.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 263140243 is about 16221.5980408836. The cubic root of 263140243 is about 640.8097197499.

The spelling of 263140243 in words is "two hundred sixty-three million, one hundred forty thousand, two hundred forty-three".