21532433255225 has 12 divisors (see below), whose sum is σ = 26716527743724. Its totient is φ = 17215423696320.

The previous prime is 21532433255197. The next prime is 21532433255329. The reversal of 21532433255225 is 52255233423512.

It can be written as a sum of positive squares in 6 ways, for example, as 271813121449 + 21260620133776 = 521357^2 + 4610924^2 .

It is not a de Polignac number, because 21532433255225 - 2³⁴ = 21515253386041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263030954 + ... + 263112803.

It is an arithmetic number, because the mean of its divisors is an integer number (2226377311977).

Almost surely, 2^{21532433255225} is an apocalyptic number.

21532433255225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21532433255225 is a deficient number, since it is larger than the sum of its proper divisors (5184094488499).

21532433255225 is a wasteful number, since it uses less digits than its factorization.

21532433255225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526145404 (or 526145399 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 44.

Adding to 21532433255225 its reverse (52255233423512), we get a palindrome (73787666678737).

The spelling of 21532433255225 in words is "twenty-one trillion, five hundred thirty-two billion, four hundred thirty-three million, two hundred fifty-five thousand, two hundred twenty-five".