2113506 has 16 divisors (see below), whose sum is σ = 4696800. Its totient is φ = 704484.

The previous prime is 2113471. The next prime is 2113511. The reversal of 2113506 is 6053112.

2113506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2113506² = 8933815224072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19516 + ... + 19623.

It is an arithmetic number, because the mean of its divisors is an integer number (293550).

2^2113506 is an apocalyptic number.

2113506 is an abundant number, since it is smaller than the sum of its proper divisors (2583294).

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

2113506 is a wasteful number, since it uses less digits than its factorization.

2113506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39150 (or 39144 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2113506 is about 1453.7902187042. The cubic root of 2113506 is about 128.3318618298.

Adding to 2113506 its reverse (6053112), we get a palindrome (8166618).

The spelling of 2113506 in words is "two million, one hundred thirteen thousand, five hundred six".