2167657221 has 16 divisors (see below), whose sum is σ = 2930412800. Its totient is φ = 1425048768.

The previous prime is 2167657213. The next prime is 2167657223. The reversal of 2167657221 is 1227567612.

It is not a de Polignac number, because 2167657221 - 2³ = 2167657213 is a prime.

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 2167657221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2167657223) 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 15 ways as a sum of consecutive naturals, for example, 202635 + ... + 213063.

It is an arithmetic number, because the mean of its divisors is an integer number (183150800).

Almost surely, 2^2167657221 is an apocalyptic number.

It is an amenable number.

2167657221 is a deficient number, since it is larger than the sum of its proper divisors (762755579).

2167657221 is a wasteful number, since it uses less digits than its factorization.

2167657221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388.

The product of its digits is 70560, while the sum is 39.

The square root of 2167657221 is about 46558.1058570900. The cubic root of 2167657221 is about 1294.1865109511.

The spelling of 2167657221 in words is "two billion, one hundred sixty-seven million, six hundred fifty-seven thousand, two hundred twenty-one".