2151171 has 16 divisors (see below), whose sum is σ = 3477120. Its totient is φ = 1303560.

The previous prime is 2151157. The next prime is 2151179. The reversal of 2151171 is 1711512.

It is a happy number.

It is not a de Polignac number, because 2151171 - 2⁵ = 2151139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2151179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3325 + ... + 3918.

It is an arithmetic number, because the mean of its divisors is an integer number (217320).

2^2151171 is an apocalyptic number.

2151171 is a deficient number, since it is larger than the sum of its proper divisors (1325949).

2151171 is a wasteful number, since it uses less digits than its factorization.

2151171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7263 (or 7257 counting only the distinct ones).

The product of its digits is 70, while the sum is 18.

The square root of 2151171 is about 1466.6870831912. The cubic root of 2151171 is about 129.0897158492.

Adding to 2151171 its reverse (1711512), we get a palindrome (3862683).

The spelling of 2151171 in words is "two million, one hundred fifty-one thousand, one hundred seventy-one".