163782215 has 4 divisors (see below), whose sum is σ = 196538664. Its totient is φ = 131025768.

The previous prime is 163782211. The next prime is 163782217. The reversal of 163782215 is 512287361.

It is a happy number.

163782215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 163782215 - 2² = 163782211 is a prime.

It is a super-2 number, since 2×163782215² = 53649227900612450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163782211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16378217 + ... + 16378226.

It is an arithmetic number, because the mean of its divisors is an integer number (49134666).

Almost surely, 2^163782215 is an apocalyptic number.

163782215 is a deficient number, since it is larger than the sum of its proper divisors (32756449).

163782215 is an equidigital number, since it uses as much as digits as its factorization.

163782215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32756448.

The product of its digits is 20160, while the sum is 35.

The square root of 163782215 is about 12797.7425743762. The cubic root of 163782215 is about 547.1279653200.

The spelling of 163782215 in words is "one hundred sixty-three million, seven hundred eighty-two thousand, two hundred fifteen".