263148563 has 4 divisors (see below), whose sum is σ = 265562880. Its totient is φ = 260734248.

The previous prime is 263148511. The next prime is 263148583. The reversal of 263148563 is 365841362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365841362 = 2 ⋅182920681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263148563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263148503) 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, 1206995 + ... + 1207212.

It is an arithmetic number, because the mean of its divisors is an integer number (66390720).

Almost surely, 2^263148563 is an apocalyptic number.

263148563 is a deficient number, since it is larger than the sum of its proper divisors (2414317).

263148563 is a wasteful number, since it uses less digits than its factorization.

263148563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414316.

The product of its digits is 103680, while the sum is 38.

The square root of 263148563 is about 16221.8544870801. The cubic root of 263148563 is about 640.8164734117.

The spelling of 263148563 in words is "two hundred sixty-three million, one hundred forty-eight thousand, five hundred sixty-three".