163216145 has 4 divisors (see below), whose sum is σ = 195859380. Its totient is φ = 130572912.

The previous prime is 163216127. The next prime is 163216159. The reversal of 163216145 is 541612361.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105349696 + 57866449 = 10264^2 + 7607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163216145 is a prime.

It is a super-2 number, since 2×163216145² = 53279019977322050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16321610 + ... + 16321619.

It is an arithmetic number, because the mean of its divisors is an integer number (48964845).

Almost surely, 2^163216145 is an apocalyptic number.

It is an amenable number.

163216145 is a deficient number, since it is larger than the sum of its proper divisors (32643235).

163216145 is an equidigital number, since it uses as much as digits as its factorization.

163216145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32643234.

The product of its digits is 4320, while the sum is 29.

The square root of 163216145 is about 12775.6074219585. The cubic root of 163216145 is about 546.4969032570.

It can be divided in two parts, 163216 and 145, that added together give a palindrome (163361).

The spelling of 163216145 in words is "one hundred sixty-three million, two hundred sixteen thousand, one hundred forty-five".