875957221 has 4 divisors (see below), whose sum is σ = 876836812. Its totient is φ = 875077632.

The previous prime is 875957219. The next prime is 875957309. The reversal of 875957221 is 122759578.

It is a happy number.

875957221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 685130625 + 190826596 = 26175^2 + 13814^2 .

It is a cyclic number.

It is not a de Polignac number, because 875957221 - 2¹ = 875957219 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 (875957321) 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, 438300 + ... + 440293.

It is an arithmetic number, because the mean of its divisors is an integer number (219209203).

Almost surely, 2^875957221 is an apocalyptic number.

It is an amenable number.

875957221 is a deficient number, since it is larger than the sum of its proper divisors (879591).

875957221 is an equidigital number, since it uses as much as digits as its factorization.

875957221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879590.

The product of its digits is 352800, while the sum is 46.

The square root of 875957221 is about 29596.5744808415. The cubic root of 875957221 is about 956.8142448310.

The spelling of 875957221 in words is "eight hundred seventy-five million, nine hundred fifty-seven thousand, two hundred twenty-one".