216802355 has 24 divisors (see below), whose sum is σ = 326822496. Its totient is φ = 135146880.

The previous prime is 216802349. The next prime is 216802361. The reversal of 216802355 is 553208612.

It is an interprime number because it is at equal distance from previous prime (216802349) and next prime (216802361).

It is not a de Polignac number, because 216802355 - 2¹² = 216798259 is a prime.

It is a super-2 number, since 2×216802355² = 94006522267092050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21362 + ... + 29831.

It is an arithmetic number, because the mean of its divisors is an integer number (13617604).

Almost surely, 2^216802355 is an apocalyptic number.

216802355 is a deficient number, since it is larger than the sum of its proper divisors (110020141).

216802355 is a wasteful number, since it uses less digits than its factorization.

216802355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51227 (or 51216 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 216802355 is about 14724.2098259975. The cubic root of 216802355 is about 600.7420033032.

The spelling of 216802355 in words is "two hundred sixteen million, eight hundred two thousand, three hundred fifty-five".