21252550131562 has 16 divisors (see below), whose sum is σ = 32001295505472. Its totient is φ = 10585472960160.

The previous prime is 21252550131557. The next prime is 21252550131581. The reversal of 21252550131562 is 26513105525212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3337278 + ... + 7324105.

It is an arithmetic number, because the mean of its divisors is an integer number (2000080969092).

Almost surely, 2^{21252550131562} is an apocalyptic number.

21252550131562 is a deficient number, since it is larger than the sum of its proper divisors (10748745373910).

21252550131562 is a wasteful number, since it uses less digits than its factorization.

21252550131562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10665213.

The product of its (nonzero) digits is 180000, while the sum is 40.

Adding to 21252550131562 its reverse (26513105525212), we get a palindrome (47765655656774).

The spelling of 21252550131562 in words is "twenty-one trillion, two hundred fifty-two billion, five hundred fifty million, one hundred thirty-one thousand, five hundred sixty-two".