2155015 has 8 divisors (see below), whose sum is σ = 2596608. Its totient is φ = 1716960.

The previous prime is 2155009. The next prime is 2155057. The reversal of 2155015 is 5105512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2155015 - 2³ = 2155007 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154983 and 2155001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 2200.

It is an arithmetic number, because the mean of its divisors is an integer number (324576).

2^2155015 is an apocalyptic number.

2155015 is a deficient number, since it is larger than the sum of its proper divisors (441593).

2155015 is a wasteful number, since it uses less digits than its factorization.

2155015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 2155015 is about 1467.9969346017. The cubic root of 2155015 is about 129.1665616833.

The spelling of 2155015 in words is "two million, one hundred fifty-five thousand, fifteen".