21467216464225 has 24 divisors (see below), whose sum is σ = 31744813023360. Its totient is φ = 14080360609920.

The previous prime is 21467216464193. The next prime is 21467216464247. The reversal of 21467216464225 is 52246461276412.

It is not a de Polignac number, because 21467216464225 - 2⁵ = 21467216464193 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2666730940 + ... + 2666738989.

It is an arithmetic number, because the mean of its divisors is an integer number (1322700542640).

Almost surely, 2^{21467216464225} is an apocalyptic number.

21467216464225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21467216464225 is a deficient number, since it is larger than the sum of its proper divisors (10277596559135).

21467216464225 is a wasteful number, since it uses less digits than its factorization.

21467216464225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5333469969 (or 5333469964 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 52.

The spelling of 21467216464225 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred sixteen million, four hundred sixty-four thousand, two hundred twenty-five".