213444001 has 2 divisors, whose sum is σ = 213444002. Its totient is φ = 213444000.

The previous prime is 213443999. The next prime is 213444029. The reversal of 213444001 is 100444312.

213444001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 96825600 = 10799^2 + 9840^2 .

It is a cyclic number.

It is not a de Polignac number, because 213444001 - 2¹ = 213443999 is a prime.

Together with 213443999, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213444001.

It is not a weakly prime, because it can be changed into another prime (213444041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106722000 + 106722001.

It is an arithmetic number, because the mean of its divisors is an integer number (106722001).

Almost surely, 2^213444001 is an apocalyptic number.

It is an amenable number.

213444001 is a deficient number, since it is larger than the sum of its proper divisors (1).

213444001 is an equidigital number, since it uses as much as digits as its factorization.

213444001 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 213444001 is about 14609.7228242017. The cubic root of 213444001 is about 597.6239372229.

Adding to 213444001 its reverse (100444312), we get a palindrome (313888313).

The spelling of 213444001 in words is "two hundred thirteen million, four hundred forty-four thousand, one".