2113571 has 4 divisors (see below), whose sum is σ = 2133432. Its totient is φ = 2093712.

The previous prime is 2113567. The next prime is 2113583. The reversal of 2113571 is 1753112.

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 2113571 - 2² = 2113567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9770 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (533358).

2^2113571 is an apocalyptic number.

2113571 is a deficient number, since it is larger than the sum of its proper divisors (19861).

2113571 is a wasteful number, since it uses less digits than its factorization.

2113571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19860.

The product of its digits is 210, while the sum is 20.

The square root of 2113571 is about 1453.8125738898. The cubic root of 2113571 is about 128.3331774140. Note that the first 3 decimals are identical.

Adding to 2113571 its reverse (1753112), we get a palindrome (3866683).

The spelling of 2113571 in words is "two million, one hundred thirteen thousand, five hundred seventy-one".