2115530 has 16 divisors (see below), whose sum is σ = 3852360. Its totient is φ = 836352.

The previous prime is 2115527. The next prime is 2115539. The reversal of 2115530 is 355112.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 840889 = 1129^2 + 917^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2115499 and 2115508.

It is not an unprimeable number, because it can be changed into a prime (2115539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299 + ... + 2078.

2^2115530 is an apocalyptic number.

2115530 is a deficient number, since it is larger than the sum of its proper divisors (1736830).

2115530 is a wasteful number, since it uses less digits than its factorization.

2115530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2115530 is about 1454.4861635643. The cubic root of 2115530 is about 128.3728144488.

It can be divided in two parts, 21 and 15530, that added together give a palindrome (15551).

The spelling of 2115530 in words is "two million, one hundred fifteen thousand, five hundred thirty".