2151227 has 4 divisors (see below), whose sum is σ = 2316720. Its totient is φ = 1985736.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151227 is 7221512.

2151227 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 is a cyclic number.

It is not a de Polignac number, because 2151227 - 2⁴ = 2151211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151199 and 2151208.

It is not an unprimeable number, because it can be changed into a prime (2151221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82727 + ... + 82752.

It is an arithmetic number, because the mean of its divisors is an integer number (579180).

2^2151227 is an apocalyptic number.

2151227 is a deficient number, since it is larger than the sum of its proper divisors (165493).

2151227 is a wasteful number, since it uses less digits than its factorization.

2151227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165492.

The product of its digits is 280, while the sum is 20.

The square root of 2151227 is about 1466.7061737103. The cubic root of 2151227 is about 129.0908360083.

Adding to 2151227 its reverse (7221512), we get a palindrome (9372739).

The spelling of 2151227 in words is "two million, one hundred fifty-one thousand, two hundred twenty-seven".