213144101 has 4 divisors (see below), whose sum is σ = 213412332. Its totient is φ = 212875872.

The previous prime is 213144073. The next prime is 213144119. The reversal of 213144101 is 101441312.

It is a happy number.

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 177156100 + 35988001 = 13310^2 + 5999^2 .

It is a cyclic number.

It is not a de Polignac number, because 213144101 - 2²⁶ = 146035237 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 213144101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213144121) 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, 132920 + ... + 134513.

It is an arithmetic number, because the mean of its divisors is an integer number (53353083).

Almost surely, 2^213144101 is an apocalyptic number.

It is an amenable number.

213144101 is a deficient number, since it is larger than the sum of its proper divisors (268231).

213144101 is an equidigital number, since it uses as much as digits as its factorization.

213144101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268230.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 213144101 is about 14599.4555035453. The cubic root of 213144101 is about 597.3439083865.

Adding to 213144101 its reverse (101441312), we get a palindrome (314585413).

The spelling of 213144101 in words is "two hundred thirteen million, one hundred forty-four thousand, one hundred one".