216825369 has 8 divisors (see below), whose sum is σ = 289179072. Its totient is φ = 144510960.

The previous prime is 216825331. The next prime is 216825391. The reversal of 216825369 is 963528612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216825369 - 2¹² = 216821273 is a prime.

It is a super-3 number, since 3×216825369³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 216825369.

It is not an unprimeable number, because it can be changed into a prime (216825269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7339 + ... + 22079.

It is an arithmetic number, because the mean of its divisors is an integer number (36147384).

Almost surely, 2^216825369 is an apocalyptic number.

It is an amenable number.

216825369 is a deficient number, since it is larger than the sum of its proper divisors (72353703).

216825369 is a wasteful number, since it uses less digits than its factorization.

216825369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19647.

The product of its digits is 155520, while the sum is 42.

The square root of 216825369 is about 14724.9913072979. The cubic root of 216825369 is about 600.7632592028.

The spelling of 216825369 in words is "two hundred sixteen million, eight hundred twenty-five thousand, three hundred sixty-nine".