216953435 has 4 divisors (see below), whose sum is σ = 260344128. Its totient is φ = 173562744.

The previous prime is 216953383. The next prime is 216953453. The reversal of 216953435 is 534359612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216953435 - 2¹² = 216949339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21695339 + ... + 21695348.

It is an arithmetic number, because the mean of its divisors is an integer number (65086032).

Almost surely, 2^216953435 is an apocalyptic number.

216953435 is a deficient number, since it is larger than the sum of its proper divisors (43390693).

216953435 is an equidigital number, since it uses as much as digits as its factorization.

216953435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43390692.

The product of its digits is 97200, while the sum is 38.

The square root of 216953435 is about 14729.3392587719. The cubic root of 216953435 is about 600.8815144381.

The spelling of 216953435 in words is "two hundred sixteen million, nine hundred fifty-three thousand, four hundred thirty-five".