21522003504525 has 36 divisors (see below), whose sum is σ = 38562519921120. Its totient is φ = 11474167533600.

The previous prime is 21522003504523. The next prime is 21522003504557. The reversal of 21522003504525 is 52540530022512.

21522003504525 is a `hidden beast` number, since 2 + 1 + 52 + 200 + 350 + 4 + 52 + 5 = 666.

It is not a de Polignac number, because 21522003504525 - 2¹ = 21522003504523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21522003504525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21522003504523) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17031735 + ... + 18251684.

It is an arithmetic number, because the mean of its divisors is an integer number (1071181108920).

Almost surely, 2^{21522003504525} is an apocalyptic number.

21522003504525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21522003504525 is a deficient number, since it is larger than the sum of its proper divisors (17040516416595).

21522003504525 is a wasteful number, since it uses less digits than its factorization.

21522003504525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35286146 (or 35286138 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 21522003504525 in words is "twenty-one trillion, five hundred twenty-two billion, three million, five hundred four thousand, five hundred twenty-five".