2521204306 has 4 divisors (see below), whose sum is σ = 3781806462. Its totient is φ = 1260602152.

The previous prime is 2521204303. The next prime is 2521204313. The reversal of 2521204306 is 6034021252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2236438681 + 284765625 = 47291^2 + 16875^2 .

It is not an unprimeable number, because it can be changed into a prime (2521204303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630301075 + ... + 630301078.

Almost surely, 2^2521204306 is an apocalyptic number.

2521204306 is a deficient number, since it is larger than the sum of its proper divisors (1260602156).

2521204306 is a wasteful number, since it uses less digits than its factorization.

2521204306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260602155.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2521204306 is about 50211.5953341457. The cubic root of 2521204306 is about 1361.0351666820.

Adding to 2521204306 its reverse (6034021252), we get a palindrome (8555225558).

The spelling of 2521204306 in words is "two billion, five hundred twenty-one million, two hundred four thousand, three hundred six".