212243401 has 2 divisors, whose sum is σ = 212243402. Its totient is φ = 212243400.

The previous prime is 212243393. The next prime is 212243407. The reversal of 212243401 is 104342212.

212243401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149817600 + 62425801 = 12240^2 + 7901^2 .

It is a cyclic number.

It is not a de Polignac number, because 212243401 - 2³ = 212243393 is a prime.

It is a super-2 number, since 2×212243401² = 90094522536093602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212243407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121700 + 106121701.

It is an arithmetic number, because the mean of its divisors is an integer number (106121701).

Almost surely, 2^212243401 is an apocalyptic number.

It is an amenable number.

212243401 is a deficient number, since it is larger than the sum of its proper divisors (1).

212243401 is an equidigital number, since it uses as much as digits as its factorization.

212243401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 212243401 is about 14568.5758054794. The cubic root of 212243401 is about 596.5013058122.

Adding to 212243401 its reverse (104342212), we get a palindrome (316585613).

It can be divided in two parts, 21 and 2243401, that added together give a palindrome (2243422).

The spelling of 212243401 in words is "two hundred twelve million, two hundred forty-three thousand, four hundred one".