213105001 has 4 divisors (see below), whose sum is σ = 213176404. Its totient is φ = 213033600.

The previous prime is 213104999. The next prime is 213105077. The reversal of 213105001 is 100501312.

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 10896601 + 202208400 = 3301^2 + 14220^2 .

It is a cyclic number.

It is not a de Polignac number, because 213105001 - 2¹ = 213104999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213105301) 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, 31020 + ... + 37261.

It is an arithmetic number, because the mean of its divisors is an integer number (53294101).

Almost surely, 2^213105001 is an apocalyptic number.

It is an amenable number.

213105001 is a deficient number, since it is larger than the sum of its proper divisors (71403).

213105001 is an equidigital number, since it uses as much as digits as its factorization.

213105001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71402.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 213105001 is about 14598.1163510913. The cubic root of 213105001 is about 597.3073797735.

Adding to 213105001 its reverse (100501312), we get a palindrome (313606313).

The spelling of 213105001 in words is "two hundred thirteen million, one hundred five thousand, one".