21032025225 has 24 divisors (see below), whose sum is σ = 35621074272. Its totient is φ = 10943491200.

The previous prime is 21032025191. The next prime is 21032025247. The reversal of 21032025225 is 52252023012.

It is not a de Polignac number, because 21032025225 - 2⁸ = 21032024969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21032025195 and 21032025204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3416767 + ... + 3422916.

It is an arithmetic number, because the mean of its divisors is an integer number (1484211428).

Almost surely, 2^21032025225 is an apocalyptic number.

21032025225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21032025225 is a deficient number, since it is larger than the sum of its proper divisors (14589049047).

21032025225 is a wasteful number, since it uses less digits than its factorization.

21032025225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6839737 (or 6839732 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 21032025225 its reverse (52252023012), we get a palindrome (73284048237).

The spelling of 21032025225 in words is "twenty-one billion, thirty-two million, twenty-five thousand, two hundred twenty-five".