2521056447 has 64 divisors (see below), whose sum is σ = 4607016960. Its totient is φ = 1326834432.

The previous prime is 2521056413. The next prime is 2521056451. The reversal of 2521056447 is 7446501252.

It is a happy number.

2521056447 is a `hidden beast` number, since 2 + 5 + 2 + 1 + 0 + 5 + 644 + 7 = 666.

It is not a de Polignac number, because 2521056447 - 2²⁶ = 2453947583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521056467) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1515138 + ... + 1516800.

It is an arithmetic number, because the mean of its divisors is an integer number (71984640).

Almost surely, 2^2521056447 is an apocalyptic number.

2521056447 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2521056447 is a deficient number, since it is larger than the sum of its proper divisors (2085960513).

2521056447 is a wasteful number, since it uses less digits than its factorization.

2521056447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 2521056447 is about 50210.1229534444. The cubic root of 2521056447 is about 1361.0085596576.

Adding to 2521056447 its reverse (7446501252), we get a palindrome (9967557699).

The spelling of 2521056447 in words is "two billion, five hundred twenty-one million, fifty-six thousand, four hundred forty-seven".