2154511 has 4 divisors (see below), whose sum is σ = 2168392. Its totient is φ = 2140632.

The previous prime is 2154499. The next prime is 2154533. The reversal of 2154511 is 1154512.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2154511 is a prime.

It is a Duffinian number.

2154511 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6705 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (542098).

2^2154511 is an apocalyptic number.

2154511 is a deficient number, since it is larger than the sum of its proper divisors (13881).

2154511 is a wasteful number, since it uses less digits than its factorization.

2154511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13880.

The product of its digits is 200, while the sum is 19.

The square root of 2154511 is about 1467.8252620799. The cubic root of 2154511 is about 129.1564913710.

Subtracting from 2154511 its reverse (1154512), we obtain a palindrome (999999).

The spelling of 2154511 in words is "two million, one hundred fifty-four thousand, five hundred eleven".