2512205221 has 4 divisors (see below), whose sum is σ = 2513869344. Its totient is φ = 2510541100.

The previous prime is 2512205207. The next prime is 2512205233. The reversal of 2512205221 is 1225022152.

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 a de Polignac number, because none of the positive numbers 2^k-2512205221 is a prime.

It is a super-2 number, since 2×2512205221² = 12622350144839317682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2512205192 and 2512205201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2512205261) 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, 829795 + ... + 832816.

It is an arithmetic number, because the mean of its divisors is an integer number (628467336).

Almost surely, 2^2512205221 is an apocalyptic number.

It is an amenable number.

2512205221 is a deficient number, since it is larger than the sum of its proper divisors (1664123).

2512205221 is a wasteful number, since it uses less digits than its factorization.

2512205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664122.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2512205221 is about 50121.9036051106. The cubic root of 2512205221 is about 1359.4138948318.

Adding to 2512205221 its reverse (1225022152), we get a palindrome (3737227373).

The spelling of 2512205221 in words is "two billion, five hundred twelve million, two hundred five thousand, two hundred twenty-one".