641022271 has 8 divisors (see below), whose sum is σ = 650255760. Its totient is φ = 631801152.

The previous prime is 641022181. The next prime is 641022289. The reversal of 641022271 is 172220146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641022271 - 2¹¹ = 641020223 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 (641022871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166656 + ... + 170458.

It is an arithmetic number, because the mean of its divisors is an integer number (81281970).

Almost surely, 2^641022271 is an apocalyptic number.

641022271 is a deficient number, since it is larger than the sum of its proper divisors (9233489).

641022271 is a wasteful number, since it uses less digits than its factorization.

641022271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 641022271 is about 25318.4176243303. The cubic root of 641022271 is about 862.2324686181.

The spelling of 641022271 in words is "six hundred forty-one million, twenty-two thousand, two hundred seventy-one".