641283211 has 4 divisors (see below), whose sum is σ = 649400800. Its totient is φ = 633165624.

The previous prime is 641283191. The next prime is 641283257. The reversal of 641283211 is 112382146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112382146 = 2 ⋅56191073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641283211 is a prime.

It is a super-2 number, since 2×641283211² = 822488313420941042, which contains 22 as substring.

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 641283211.

It is not an unprimeable number, because it can be changed into a prime (641283011) 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, 4058676 + ... + 4058833.

It is an arithmetic number, because the mean of its divisors is an integer number (162350200).

Almost surely, 2^641283211 is an apocalyptic number.

641283211 is a deficient number, since it is larger than the sum of its proper divisors (8117589).

641283211 is an equidigital number, since it uses as much as digits as its factorization.

641283211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8117588.

The product of its digits is 2304, while the sum is 28.

The square root of 641283211 is about 25323.5702656636. The cubic root of 641283211 is about 862.3494486507.

The spelling of 641283211 in words is "six hundred forty-one million, two hundred eighty-three thousand, two hundred eleven".