21334534225 has 12 divisors (see below), whose sum is σ = 26903211120. Its totient is φ = 16778344400.

The previous prime is 21334534201. The next prime is 21334534231. The reversal of 21334534225 is 52243543312.

It is not a de Polignac number, because 21334534225 - 2⁹ = 21334533713 is a prime.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 7230571 + ... + 7233520.

It is an arithmetic number, because the mean of its divisors is an integer number (2241934260).

Almost surely, 2^21334534225 is an apocalyptic number.

21334534225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21334534225 is a deficient number, since it is larger than the sum of its proper divisors (5568676895).

21334534225 is a wasteful number, since it uses less digits than its factorization.

21334534225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14464160 (or 14464155 counting only the distinct ones).

The product of its digits is 86400, while the sum is 34.

The spelling of 21334534225 in words is "twenty-one billion, three hundred thirty-four million, five hundred thirty-four thousand, two hundred twenty-five".