2021601613 has 4 divisors (see below), whose sum is σ = 2068615648. Its totient is φ = 1974587580.

The previous prime is 2021601601. The next prime is 2021601619. The reversal of 2021601613 is 3161061202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021601613 - 2⁵ = 2021601581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021601619) 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, 23506953 + ... + 23507038.

It is an arithmetic number, because the mean of its divisors is an integer number (517153912).

Almost surely, 2^2021601613 is an apocalyptic number.

It is an amenable number.

2021601613 is a deficient number, since it is larger than the sum of its proper divisors (47014035).

2021601613 is an equidigital number, since it uses as much as digits as its factorization.

2021601613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47014034.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2021601613 is about 44962.2242888405. The cubic root of 2021601613 is about 1264.4408706610.

Adding to 2021601613 its reverse (3161061202), we get a palindrome (5182662815).

The spelling of 2021601613 in words is "two billion, twenty-one million, six hundred one thousand, six hundred thirteen".