212643253 has 2 divisors, whose sum is σ = 212643254. Its totient is φ = 212643252.

The previous prime is 212643247. The next prime is 212643281. The reversal of 212643253 is 352346212.

It is an a-pointer prime, because the next prime (212643281) can be obtained adding 212643253 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209467729 + 3175524 = 14473^2 + 1782^2 .

It is a cyclic number.

It is not a de Polignac number, because 212643253 - 2²¹ = 210546101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212643553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106321626 + 106321627.

It is an arithmetic number, because the mean of its divisors is an integer number (106321627).

Almost surely, 2^212643253 is an apocalyptic number.

It is an amenable number.

212643253 is a deficient number, since it is larger than the sum of its proper divisors (1).

212643253 is an equidigital number, since it uses as much as digits as its factorization.

212643253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 212643253 is about 14582.2924466628. The cubic root of 212643253 is about 596.8756599976.

Adding to 212643253 its reverse (352346212), we get a palindrome (564989465).

The spelling of 212643253 in words is "two hundred twelve million, six hundred forty-three thousand, two hundred fifty-three".