21352525200555 has 16 divisors (see below), whose sum is σ = 34226497446144. Its totient is φ = 11367194398560.

The previous prime is 21352525200491. The next prime is 21352525200577. The reversal of 21352525200555 is 55500252525312.

It is a happy number.

It is not a de Polignac number, because 21352525200555 - 2⁶ = 21352525200491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1301181631 + ... + 1301198040.

It is an arithmetic number, because the mean of its divisors is an integer number (2139156090384).

Almost surely, 2^{21352525200555} is an apocalyptic number.

21352525200555 is a deficient number, since it is larger than the sum of its proper divisors (12873972245589).

21352525200555 is a wasteful number, since it uses less digits than its factorization.

21352525200555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602380226.

The product of its (nonzero) digits is 750000, while the sum is 42.

Adding to 21352525200555 its reverse (55500252525312), we get a palindrome (76852777725867).

The spelling of 21352525200555 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred thousand, five hundred fifty-five".