2155535 has 4 divisors (see below), whose sum is σ = 2586648. Its totient is φ = 1724424.

The previous prime is 2155519. The next prime is 2155579. The reversal of 2155535 is 5355512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155535 - 2⁴ = 2155519 is a prime.

It is a super-2 number, since 2×2155535² = 9292662272450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215549 + ... + 215558.

It is an arithmetic number, because the mean of its divisors is an integer number (646662).

2^2155535 is an apocalyptic number.

2155535 is a deficient number, since it is larger than the sum of its proper divisors (431113).

2155535 is an equidigital number, since it uses as much as digits as its factorization.

2155535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431112.

The product of its digits is 3750, while the sum is 26.

The square root of 2155535 is about 1468.1740360053. The cubic root of 2155535 is about 129.1769500427.

The spelling of 2155535 in words is "two million, one hundred fifty-five thousand, five hundred thirty-five".