2115655 has 8 divisors (see below), whose sum is σ = 2649312. Its totient is φ = 1618848.

The previous prime is 2115653. The next prime is 2115671. The reversal of 2115655 is 5565112.

2115655 = T₂₈₀ + T₂₈₁ + ... + T₃₂₅.

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 2115655 - 2¹ = 2115653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115653) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9084 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (331164).

2^2115655 is an apocalyptic number.

2115655 is a deficient number, since it is larger than the sum of its proper divisors (533657).

2115655 is a wasteful number, since it uses less digits than its factorization.

2115655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its digits is 1500, while the sum is 25.

The square root of 2115655 is about 1454.5291334312. The cubic root of 2115655 is about 128.3753427807.

The spelling of 2115655 in words is "two million, one hundred fifteen thousand, six hundred fifty-five".