4006521103 has 16 divisors (see below), whose sum is σ = 4377210880. Its totient is φ = 3644930016.

The previous prime is 4006521067. The next prime is 4006521109. The reversal of 4006521103 is 3011256004.

It is not a de Polignac number, because 4006521103 - 2⁹ = 4006520591 is a prime.

It is a super-2 number, since 2×4006521103² = 32104422697568673218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006521109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620176 + ... + 626602.

It is an arithmetic number, because the mean of its divisors is an integer number (273575680).

Almost surely, 2^4006521103 is an apocalyptic number.

4006521103 is a deficient number, since it is larger than the sum of its proper divisors (370689777).

4006521103 is a wasteful number, since it uses less digits than its factorization.

4006521103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7126.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4006521103 is about 63297.0860545728. The cubic root of 4006521103 is about 1588.2632174288.

Adding to 4006521103 its reverse (3011256004), we get a palindrome (7017777107).

The spelling of 4006521103 in words is "four billion, six million, five hundred twenty-one thousand, one hundred three".