263212321 has 4 divisors (see below), whose sum is σ = 263265472. Its totient is φ = 263159172.

The previous prime is 263212303. The next prime is 263212337. The reversal of 263212321 is 123212362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263212321 - 2¹¹ = 263210273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263212292 and 263212301.

It is not an unprimeable number, because it can be changed into a prime (263212421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18285 + ... + 29338.

It is an arithmetic number, because the mean of its divisors is an integer number (65816368).

Almost surely, 2^263212321 is an apocalyptic number.

It is an amenable number.

263212321 is a deficient number, since it is larger than the sum of its proper divisors (53151).

263212321 is an equidigital number, since it uses as much as digits as its factorization.

263212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53150.

The product of its digits is 864, while the sum is 22.

The square root of 263212321 is about 16223.8195564423. The cubic root of 263212321 is about 640.8682234916.

Adding to 263212321 its reverse (123212362), we get a palindrome (386424683).

The spelling of 263212321 in words is "two hundred sixty-three million, two hundred twelve thousand, three hundred twenty-one".