216353025 has 60 divisors (see below), whose sum is σ = 458042112. Its totient is φ = 98897760.

The previous prime is 216352993. The next prime is 216353047. The reversal of 216353025 is 520353612.

216353025 is a `hidden beast` number, since 2 + 1 + 635 + 3 + 0 + 25 = 666.

It is not a de Polignac number, because 216353025 - 2⁵ = 216352993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216353025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6544 + ... + 21806.

Almost surely, 2^216353025 is an apocalyptic number.

216353025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216353025 is an abundant number, since it is smaller than the sum of its proper divisors (241689087).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216353025 is a wasteful number, since it uses less digits than its factorization.

216353025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15292 (or 15278 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 216353025 is about 14708.9437078262. The cubic root of 216353025 is about 600.3266970827.

The spelling of 216353025 in words is "two hundred sixteen million, three hundred fifty-three thousand, twenty-five".