641500213 has 4 divisors (see below), whose sum is σ = 663620940. Its totient is φ = 619379488.

The previous prime is 641500201. The next prime is 641500247. The reversal of 641500213 is 312005146.

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 372605809 + 268894404 = 19303^2 + 16398^2 .

It is a cyclic number.

It is not a de Polignac number, because 641500213 - 2⁹ = 641499701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641500283) 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, 11060320 + ... + 11060377.

It is an arithmetic number, because the mean of its divisors is an integer number (165905235).

Almost surely, 2^641500213 is an apocalyptic number.

It is an amenable number.

641500213 is a deficient number, since it is larger than the sum of its proper divisors (22120727).

641500213 is a wasteful number, since it uses less digits than its factorization.

641500213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22120726.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 641500213 is about 25327.8544886850. The cubic root of 641500213 is about 862.4467070061.

Adding to 641500213 its reverse (312005146), we get a palindrome (953505359).

The spelling of 641500213 in words is "six hundred forty-one million, five hundred thousand, two hundred thirteen".