8216145 has 24 divisors (see below), whose sum is σ = 16276416. Its totient is φ = 3755808.

The previous prime is 8216137. The next prime is 8216149. The reversal of 8216145 is 5416128.

It is not a de Polignac number, because 8216145 - 2³ = 8216137 is a prime.

It is a super-2 number, since 2×8216145² = 135010077322050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8216149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12727 + ... + 13356.

It is an arithmetic number, because the mean of its divisors is an integer number (678184).

Almost surely, 2^8216145 is an apocalyptic number.

It is an amenable number.

8216145 is a deficient number, since it is larger than the sum of its proper divisors (8060271).

8216145 is a wasteful number, since it uses less digits than its factorization.

8216145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26101 (or 26098 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 8216145 is about 2866.3818656976. The cubic root of 8216145 is about 201.7852257651.

It can be divided in two parts, 8 and 216145, that added together give a triangular number (216153 = T₆₅₇).

The spelling of 8216145 in words is "eight million, two hundred sixteen thousand, one hundred forty-five".