6506021113 has 4 divisors (see below), whose sum is σ = 6506502388. Its totient is φ = 6505539840.

The previous prime is 6506021089. The next prime is 6506021147. The reversal of 6506021113 is 3111206056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1498618944 + 5007402169 = 38712^2 + 70763^2 .

It is a cyclic number.

It is not a de Polignac number, because 6506021113 - 2⁹ = 6506020601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6506021213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219756 + ... + 247597.

It is an arithmetic number, because the mean of its divisors is an integer number (1626625597).

Almost surely, 2^6506021113 is an apocalyptic number.

It is an amenable number.

6506021113 is a deficient number, since it is larger than the sum of its proper divisors (481275).

6506021113 is a wasteful number, since it uses less digits than its factorization.

6506021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481274.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 6506021113 is about 80659.9101970737. The cubic root of 6506021113 is about 1866.8316536816.

Adding to 6506021113 its reverse (3111206056), we get a palindrome (9617227169).

The spelling of 6506021113 in words is "six billion, five hundred six million, twenty-one thousand, one hundred thirteen".