263643201 has 8 divisors (see below), whose sum is σ = 390582560. Its totient is φ = 175762116.

The previous prime is 263643199. The next prime is 263643203. The reversal of 263643201 is 102346362.

263643201 is a `hidden beast` number, since 2 + 636 + 4 + 3 + 20 + 1 = 666.

263643201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (263643199) and next prime (263643203).

It is not a de Polignac number, because 263643201 - 2¹ = 263643199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9764563 = 263643201 / (2 + 6 + 3 + 6 + 4 + 3 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263643203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4882255 + ... + 4882308.

It is an arithmetic number, because the mean of its divisors is an integer number (48822820).

Almost surely, 2^263643201 is an apocalyptic number.

It is an amenable number.

263643201 is a deficient number, since it is larger than the sum of its proper divisors (126939359).

263643201 is an equidigital number, since it uses as much as digits as its factorization.

263643201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9764572 (or 9764566 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 263643201 is about 16237.0933667329. The cubic root of 263643201 is about 641.2177344321.

Adding to 263643201 its reverse (102346362), we get a palindrome (365989563).

The spelling of 263643201 in words is "two hundred sixty-three million, six hundred forty-three thousand, two hundred one".