2154015 has 24 divisors (see below), whose sum is σ = 3770208. Its totient is φ = 1137600.

The previous prime is 2154013. The next prime is 2154037. The reversal of 2154015 is 5104512.

It is not a de Polignac number, because 2154015 - 2¹ = 2154013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6637 + ... + 6953.

It is an arithmetic number, because the mean of its divisors is an integer number (157092).

2^2154015 is an apocalyptic number.

2154015 is a deficient number, since it is larger than the sum of its proper divisors (1616193).

2154015 is a wasteful number, since it uses less digits than its factorization.

2154015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2154015 is about 1467.6562949138. The cubic root of 2154015 is about 129.1465793714.

Adding to 2154015 its reverse (5104512), we get a palindrome (7258527).

The spelling of 2154015 in words is "two million, one hundred fifty-four thousand, fifteen".