22451221005525 has 144 divisors (see below), whose sum is σ = 43390182850560. Its totient is φ = 11031424128000.

The previous prime is 22451221005463. The next prime is 22451221005547. The reversal of 22451221005525 is 52550012215422.

22451221005525 is a `hidden beast` number, since 2 + 2 + 4 + 5 + 1 + 22 + 100 + 5 + 525 = 666.

It is not a de Polignac number, because 22451221005525 - 2⁴³ = 13655127983317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22451221005525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3693239436 + ... + 3693245514.

It is an arithmetic number, because the mean of its divisors is an integer number (301320714240).

Almost surely, 2^{22451221005525} is an apocalyptic number.

22451221005525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22451221005525 is a deficient number, since it is larger than the sum of its proper divisors (20938961845035).

22451221005525 is a wasteful number, since it uses less digits than its factorization.

22451221005525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 8348 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 22451221005525 in words is "twenty-two trillion, four hundred fifty-one billion, two hundred twenty-one million, five thousand, five hundred twenty-five".