2151167 has 4 divisors (see below), whose sum is σ = 2244720. Its totient is φ = 2057616.

The previous prime is 2151157. The next prime is 2151179. The reversal of 2151167 is 7611512.

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 2151167 - 2¹² = 2147071 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 93529 = 2151167 / (2 + 1 + 5 + 1 + 1 + 6 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151137) 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, 46742 + ... + 46787.

It is an arithmetic number, because the mean of its divisors is an integer number (561180).

2^2151167 is an apocalyptic number.

2151167 is a deficient number, since it is larger than the sum of its proper divisors (93553).

2151167 is an equidigital number, since it uses as much as digits as its factorization.

2151167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93552.

The product of its digits is 420, while the sum is 23.

The square root of 2151167 is about 1466.6857195732. The cubic root of 2151167 is about 129.0896358371.

Adding to 2151167 its reverse (7611512), we get a palindrome (9762679).

The spelling of 2151167 in words is "two million, one hundred fifty-one thousand, one hundred sixty-seven".