216580025 has 12 divisors (see below), whose sum is σ = 268770000. Its totient is φ = 173128080.

The previous prime is 216580003. The next prime is 216580061. The reversal of 216580025 is 520085612.

It is not a de Polignac number, because 216580025 - 2¹² = 216575929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216580025.

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, 39926 + ... + 45024.

It is an arithmetic number, because the mean of its divisors is an integer number (22397500).

Almost surely, 2^216580025 is an apocalyptic number.

216580025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216580025 is a deficient number, since it is larger than the sum of its proper divisors (52189975).

216580025 is a wasteful number, since it uses less digits than its factorization.

216580025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808 (or 6803 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 216580025 is about 14716.6580785177. The cubic root of 216580025 is about 600.5365801783.

The spelling of 216580025 in words is "two hundred sixteen million, five hundred eighty thousand, twenty-five".