21525422033 has 2 divisors, whose sum is σ = 21525422034. Its totient is φ = 21525422032.

The previous prime is 21525422029. The next prime is 21525422071. The reversal of 21525422033 is 33022452512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10993941904 + 10531480129 = 104852^2 + 102623^2 .

It is a cyclic number.

It is not a de Polignac number, because 21525422033 - 2² = 21525422029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21525421987 and 21525422005.

It is not a weakly prime, because it can be changed into another prime (21525422533) 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 as a sum of consecutive naturals, namely, 10762711016 + 10762711017.

It is an arithmetic number, because the mean of its divisors is an integer number (10762711017).

Almost surely, 2^21525422033 is an apocalyptic number.

It is an amenable number.

21525422033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21525422033 is an equidigital number, since it uses as much as digits as its factorization.

21525422033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 21525422033 its reverse (33022452512), we get a palindrome (54547874545).

The spelling of 21525422033 in words is "twenty-one billion, five hundred twenty-five million, four hundred twenty-two thousand, thirty-three".