212231263 has 4 divisors (see below), whose sum is σ = 212517648. Its totient is φ = 211944880.

The previous prime is 212231237. The next prime is 212231287. The reversal of 212231263 is 362132212.

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 212231263 - 2⁵ = 212231231 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212031263) 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, 142078 + ... + 143563.

It is an arithmetic number, because the mean of its divisors is an integer number (53129412).

Almost surely, 2^212231263 is an apocalyptic number.

212231263 is a deficient number, since it is larger than the sum of its proper divisors (286385).

212231263 is an equidigital number, since it uses as much as digits as its factorization.

212231263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286384.

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

The square root of 212231263 is about 14568.1592179657. The cubic root of 212231263 is about 596.4899344797.

Adding to 212231263 its reverse (362132212), we get a palindrome (574363475).

The spelling of 212231263 in words is "two hundred twelve million, two hundred thirty-one thousand, two hundred sixty-three".