8216530 has 32 divisors (see below), whose sum is σ = 17076096. Its totient is φ = 2788224.

The previous prime is 8216521. The next prime is 8216539. The reversal of 8216530 is 356128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8216521) and next prime (8216539).

It is a super-2 number, since 2×8216530² = 135022730481800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8216495 and 8216504.

It is not an unprimeable number, because it can be changed into a prime (8216539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6942 + ... + 8038.

It is an arithmetic number, because the mean of its divisors is an integer number (533628).

Almost surely, 2^8216530 is an apocalyptic number.

8216530 is an abundant number, since it is smaller than the sum of its proper divisors (8859566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8216530 is a wasteful number, since it uses less digits than its factorization.

8216530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 8216530 is about 2866.4490227457. The cubic root of 8216530 is about 201.7883775311.

The spelling of 8216530 in words is "eight million, two hundred sixteen thousand, five hundred thirty".