213030001 has 4 divisors (see below), whose sum is σ = 213092212. Its totient is φ = 212967792.

The previous prime is 213029963. The next prime is 213030011. The reversal of 213030001 is 100030312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121330225 + 91699776 = 11015^2 + 9576^2 .

It is a cyclic number.

It is not a de Polignac number, because 213030001 - 2¹¹ = 213027953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213030001.

It is not an unprimeable number, because it can be changed into a prime (213030011) 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, 25650 + ... + 32923.

It is an arithmetic number, because the mean of its divisors is an integer number (53273053).

Almost surely, 2^213030001 is an apocalyptic number.

It is an amenable number.

213030001 is a deficient number, since it is larger than the sum of its proper divisors (62211).

213030001 is an equidigital number, since it uses as much as digits as its factorization.

213030001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62210.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 213030001 is about 14595.5473004612. The cubic root of 213030001 is about 597.2372995944.

Adding to 213030001 its reverse (100030312), we get a palindrome (313060313).

It can be divided in two parts, 2130 and 30001, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 213030001 in words is "two hundred thirteen million, thirty thousand, one".