2251023225521 has 16 divisors (see below), whose sum is σ = 2727019249920. Its totient is φ = 1813890186240.

The previous prime is 2251023225511. The next prime is 2251023225523. The reversal of 2251023225521 is 1255223201522.

It is a de Polignac number, because none of the positive numbers 2^k-2251023225521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2251023225523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10630781 + ... + 10840458.

It is an arithmetic number, because the mean of its divisors is an integer number (170438703120).

Almost surely, 2^{2251023225521} is an apocalyptic number.

It is an amenable number.

2251023225521 is a deficient number, since it is larger than the sum of its proper divisors (475996024399).

2251023225521 is a wasteful number, since it uses less digits than its factorization.

2251023225521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21472144.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 2251023225521 in words is "two trillion, two hundred fifty-one billion, twenty-three million, two hundred twenty-five thousand, five hundred twenty-one".