2113530 has 16 divisors (see below), whose sum is σ = 5072544. Its totient is φ = 563600.

The previous prime is 2113523. The next prime is 2113567. The reversal of 2113530 is 353112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35196 + ... + 35255.

It is an arithmetic number, because the mean of its divisors is an integer number (317034).

2^2113530 is an apocalyptic number.

2113530 is an abundant number, since it is smaller than the sum of its proper divisors (2959014).

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

2113530 is a wasteful number, since it uses less digits than its factorization.

2113530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70461.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 2113530 is about 1453.7984729666. The cubic root of 2113530 is about 128.3323475871.

Adding to 2113530 its reverse (353112), we get a palindrome (2466642).

It can be divided in two parts, 211 and 3530, that added together give a triangular number (3741 = T₈₆).

The spelling of 2113530 in words is "two million, one hundred thirteen thousand, five hundred thirty".