2115555 has 32 divisors (see below), whose sum is σ = 3843840. Its totient is φ = 984960.

The previous prime is 2115539. The next prime is 2115571. The reversal of 2115555 is 5555112.

It is an interprime number because it is at equal distance from previous prime (2115539) and next prime (2115571).

It is not a de Polignac number, because 2115555 - 2⁴ = 2115539 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3420 + ... + 3990.

It is an arithmetic number, because the mean of its divisors is an integer number (120120).

2^2115555 is an apocalyptic number.

2115555 is a deficient number, since it is larger than the sum of its proper divisors (1728285).

2115555 is a wasteful number, since it uses less digits than its factorization.

2115555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611.

The product of its digits is 1250, while the sum is 24.

The square root of 2115555 is about 1454.4947576392. The cubic root of 2115555 is about 128.3733201231.

It can be divided in two parts, 21 and 15555, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 2115555 in words is "two million, one hundred fifteen thousand, five hundred fifty-five".