2600204221 has 6 divisors (see below), whose sum is σ = 2650193210. Its totient is φ = 2551141008.

The previous prime is 2600204219. The next prime is 2600204231. The reversal of 2600204221 is 1224020062.

It can be written as a sum of positive squares in 3 ways, for example, as 1837836900 + 762367321 = 42870^2 + 27611^2 .

It is not a de Polignac number, because 2600204221 - 2¹ = 2600204219 is a prime.

It is a super-2 number, since 2×2600204221² = 13522123981812433682, 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 (2600204231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 460026 + ... + 465643.

Almost surely, 2^2600204221 is an apocalyptic number.

It is an amenable number.

2600204221 is a deficient number, since it is larger than the sum of its proper divisors (49988989).

2600204221 is an frugal number, since it uses more digits than its factorization.

2600204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925775 (or 925722 counting only the distinct ones).

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

The square root of 2600204221 is about 50992.1976482677. The cubic root of 2600204221 is about 1375.1048684314.

Adding to 2600204221 its reverse (1224020062), we get a palindrome (3824224283).

The spelling of 2600204221 in words is "two billion, six hundred million, two hundred four thousand, two hundred twenty-one".