2600042221 has 4 divisors (see below), whose sum is σ = 2971476832. Its totient is φ = 2228607612.

The previous prime is 2600042201. The next prime is 2600042239. The reversal of 2600042221 is 1222400062.

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 not a de Polignac number, because 2600042221 - 2¹⁹ = 2599517933 is a prime.

It is a super-2 number, since 2×2600042221² = 13520439101965225682, 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 (2600042201) 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, 185717295 + ... + 185717308.

It is an arithmetic number, because the mean of its divisors is an integer number (742869208).

Almost surely, 2^2600042221 is an apocalyptic number.

It is an amenable number.

2600042221 is a deficient number, since it is larger than the sum of its proper divisors (371434611).

2600042221 is an equidigital number, since it uses as much as digits as its factorization.

2600042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371434610.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2600042221 is about 50990.6091452142. The cubic root of 2600042221 is about 1375.0763102111.

Adding to 2600042221 its reverse (1222400062), we get a palindrome (3822442283).

The spelling of 2600042221 in words is "two billion, six hundred million, forty-two thousand, two hundred twenty-one".