2530443221 has 4 divisors (see below), whose sum is σ = 2531743500. Its totient is φ = 2529142944.

The previous prime is 2530443173. The next prime is 2530443241. The reversal of 2530443221 is 1223440352.

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 1864080625 + 666362596 = 43175^2 + 25814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2530443221 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 (2530443241) 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, 647216 + ... + 651113.

It is an arithmetic number, because the mean of its divisors is an integer number (632935875).

Almost surely, 2^2530443221 is an apocalyptic number.

It is an amenable number.

2530443221 is a deficient number, since it is larger than the sum of its proper divisors (1300279).

2530443221 is a wasteful number, since it uses less digits than its factorization.

2530443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300278.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2530443221 is about 50303.5110206037. The cubic root of 2530443221 is about 1362.6956376596.

Adding to 2530443221 its reverse (1223440352), we get a palindrome (3753883573).

The spelling of 2530443221 in words is "two billion, five hundred thirty million, four hundred forty-three thousand, two hundred twenty-one".