216382453 has 4 divisors (see below), whose sum is σ = 247294240. Its totient is φ = 185470668.

The previous prime is 216382447. The next prime is 216382471. The reversal of 216382453 is 354283612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216382453 - 2⁹ = 216381941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216382403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455883 + ... + 15455896.

It is an arithmetic number, because the mean of its divisors is an integer number (61823560).

Almost surely, 2^216382453 is an apocalyptic number.

It is an amenable number.

216382453 is a deficient number, since it is larger than the sum of its proper divisors (30911787).

216382453 is an equidigital number, since it uses as much as digits as its factorization.

216382453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30911786.

The product of its digits is 34560, while the sum is 34.

The square root of 216382453 is about 14709.9440175685. The cubic root of 216382453 is about 600.3539143482.

The spelling of 216382453 in words is "two hundred sixteen million, three hundred eighty-two thousand, four hundred fifty-three".