2154115 has 4 divisors (see below), whose sum is σ = 2584944. Its totient is φ = 1723288.

The previous prime is 2154109. The next prime is 2154127. The reversal of 2154115 is 5114512.

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 2154115 - 2²¹ = 56963 is a prime.

It is a super-2 number, since 2×2154115² = 9280422866450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154092 and 2154101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215407 + ... + 215416.

It is an arithmetic number, because the mean of its divisors is an integer number (646236).

2^2154115 is an apocalyptic number.

2154115 is a deficient number, since it is larger than the sum of its proper divisors (430829).

2154115 is an equidigital number, since it uses as much as digits as its factorization.

2154115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430828.

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

The square root of 2154115 is about 1467.6903624403. The cubic root of 2154115 is about 129.1485778808.

Adding to 2154115 its reverse (5114512), we get a palindrome (7268627).

The spelling of 2154115 in words is "two million, one hundred fifty-four thousand, one hundred fifteen".