263303423161 has 3 divisors (see below), whose sum is σ = 263303936293. Its totient is φ = 263302910030.

The previous prime is 263303423143. The next prime is 263303423167. The reversal of 263303423161 is 161324303362.

The square root of 263303423161 is 513131.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 161324303362 = 2 ⋅80662151681.

It is not a de Polignac number, because 263303423161 - 2⁹ = 263303422649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263303423167) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 256566 + ... + 769696.

Almost surely, 2^263303423161 is an apocalyptic number.

263303423161 is the 513131-st square number.

263303423161 is the 256566-th centered octagonal number.

It is an amenable number.

263303423161 is a deficient number, since it is larger than the sum of its proper divisors (513132).

263303423161 is an frugal number, since it uses more digits than its factorization.

263303423161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026262 (or 513131 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The spelling of 263303423161 in words is "two hundred sixty-three billion, three hundred three million, four hundred twenty-three thousand, one hundred sixty-one".