2009155 has 8 divisors (see below), whose sum is σ = 2538000. Its totient is φ = 1522656.

The previous prime is 2009113. The next prime is 2009167. The reversal of 2009155 is 5519002.

2009155 = T₃₀₆ + T₃₀₇ + ... + T₃₄₃.

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

It is a cyclic number.

It is not a de Polignac number, because 2009155 - 2¹¹ = 2007107 is a prime.

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, 10480 + ... + 10669.

It is an arithmetic number, because the mean of its divisors is an integer number (317250).

2^2009155 is an apocalyptic number.

2009155 is a deficient number, since it is larger than the sum of its proper divisors (528845).

2009155 is a wasteful number, since it uses less digits than its factorization.

2009155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21173.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 2009155 is about 1417.4466480259. The cubic root of 2009155 is about 126.1840553560.

The spelling of 2009155 in words is "two million, nine thousand, one hundred fifty-five".