2155530 has 32 divisors (see below), whose sum is σ = 5572224. Its totient is φ = 530496.

The previous prime is 2155519. The next prime is 2155579. The reversal of 2155530 is 355512.

It is a junction number, because it is equal to n+sod(n) for n = 2155497 and 2155506.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2374 + ... + 3153.

It is an arithmetic number, because the mean of its divisors is an integer number (174132).

2^2155530 is an apocalyptic number.

2155530 is an abundant number, since it is smaller than the sum of its proper divisors (3416694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155530 is a wasteful number, since it uses less digits than its factorization.

2155530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 2155530 is about 1468.1723332089. The cubic root of 2155530 is about 129.1768501625.

The spelling of 2155530 in words is "two million, one hundred fifty-five thousand, five hundred thirty".