2154515 has 16 divisors (see below), whose sum is σ = 2889216. Its totient is φ = 1528800.

The previous prime is 2154499. The next prime is 2154533. The reversal of 2154515 is 5154512.

It is a happy number.

It is not a de Polignac number, because 2154515 - 2⁴ = 2154499 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1910 + ... + 2820.

It is an arithmetic number, because the mean of its divisors is an integer number (180576).

2^2154515 is an apocalyptic number.

2154515 is a deficient number, since it is larger than the sum of its proper divisors (734701).

2154515 is a wasteful number, since it uses less digits than its factorization.

2154515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its digits is 1000, while the sum is 23.

The square root of 2154515 is about 1467.8266246393. The cubic root of 2154515 is about 129.1565713002.

The spelling of 2154515 in words is "two million, one hundred fifty-four thousand, five hundred fifteen".