2154167 has 4 divisors (see below), whose sum is σ = 2174040. Its totient is φ = 2134296.

The previous prime is 2154161. The next prime is 2154169. The reversal of 2154167 is 7614512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154167 - 2¹⁶ = 2088631 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 (2154161) 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, 9773 + ... + 9990.

It is an arithmetic number, because the mean of its divisors is an integer number (543510).

2^2154167 is an apocalyptic number.

2154167 is a deficient number, since it is larger than the sum of its proper divisors (19873).

2154167 is a wasteful number, since it uses less digits than its factorization.

2154167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872.

The product of its digits is 1680, while the sum is 26.

The square root of 2154167 is about 1467.7080772415. The cubic root of 2154167 is about 129.1496170813.

Adding to 2154167 its reverse (7614512), we get a palindrome (9768679).

The spelling of 2154167 in words is "two million, one hundred fifty-four thousand, one hundred sixty-seven".